Type name to filter
or click Headings to sort
| Company Name | Town | State | Improvement Types | Website | Phone | |
|---|---|---|---|---|---|---|
| 1-800-Plumber & Air | Shelton | CT | Boilers/Furnaces | 2039655959 | ||
| 20/20 Air Mechanical Corporation | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 456-1577 | |
| 3G Chimney, LLC | Torrington | CT | Masonry | Website | (860) 489-0700 | |
| 4-M Plumbing & Heating LLC | Preston | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (860) 886-6857 | |
| 72 Degrees A/C & Heating, LLC | Baltic | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 591-8085 | |
| A & B Cooling & Heating Corp. | South Windsor | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps | Website | (860) 528-4436 | |
| A & G Mechanical LLC | Bridgeport | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 515-6666 | ||
| A & S Nathan Heating & Cooling, LLC | Ansonia | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 735-5332 | |
| A and S Home Improvement | East Hartford | CT | Insulation, Masonry, Roofing, Siding | (860) 502-2513 | ||
| A First Response HVAC | Berlin | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 880-0012 | |
| A Plus Exterior LLC | Milford | CT | Roofing, Siding, Windows/Doors | Website | (203) 685-7121 | |
| A Touch of Air Property Services LLC | Bolton | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 729-3945 | ||
| A-1 Windows & Doors, LLC | Simsbury | CT | Siding, Windows/Doors | Website | (860) 651-9093 | |
| A-Plus Improvement Group, LLC | Ellington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing, HES audit | (860) 997-4104 | ||
| A. Troiano & Sons, Inc. | Enfield | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 745-0321 | |
| A.E. Olsen Company, Inc. | Southbury | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Plumbing | Website | (203) 264-6571 | |
| A.J. Schiano Air Conditioning & Heating, LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 504-5021 | ||
| A.V.V. Mechanical, LLC. | Wethersfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860)967-5908 | |
| A1 Home Improvement LLC | Berlin | CT | Masonry, Plumbing, Roofing, Siding, Windows/Doors | Website | (860) 202-2697 | |
| A1 Oil | Windsor Locks | CT | Boilers/Furnaces | Website | 860-627-9474 | |
| A1 Services, Inc. | Meriden | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 238-2147 | |
| A2Z HVAC | Marlborough | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 395-2388 | ||
| ABA Plumbing and Heating, LLC | West Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 573-3098 | ||
| Abbarrac Holdings, LLC | Wethersfield | CT | Masonry | Website | (860) 761-9681 | |
| ABJ Heating & Cooling LLC | Monroe | CT | 203-918-6160 | |||
| Able Construction | Norwich | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 428-6863 | |
| Able Roofing | Danbury | CT | Roofing | Website | (203) 746-1877 | |
| Abreu Construction, LLC | Farmington | CT | Hazardous Material Abatement, Masonry | Website | (203) 757-7202 | |
| Absolute Air Services, LLC | Middletown | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 666-4200 | |
| Absolute Cooling & Heating, LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 998-7100 | |
| Absolute Mechanical Systems LLC | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | Website | (860) 621-1975 | |
| Absolute Plumbing & Heating, LLC | Trumbull | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 673-8621 | ||
| Accent Windows & Doors, LLC | Simsbury | CT | Siding, Windows/Doors | Website | (860) 651-4146 | |
| Access Agency, Inc. | Willimantic | CT | Insulation, Windows/Doors, HES audit | Website | (860) 450-7400 | |
| Acclimate Mechanical | Higganum | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 619-2070 | ||
| Accu-Temp Mechanical Services, Inc. | Wolcott | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 879-0101 | |
| Accutemp Heating and Cooling, LLC | Winsted | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, HES audit | Website | (860) 309-0174 | |
| Action Construction Inc | Danbury | CT | Boilers/Furnaces, Masonry, Plumbing | Website | (203) 790-4463 | |
| Action Solar | Lehi | UT | 385-498-0550 | |||
| Action Windows & Siding, LLC | West Hartford | CT | Geothermal, Siding, Windows/Doors, HES audit | Website | (860) 953-1936 | |
| Adams & Son Heating & A/C LLC | North Stonington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (860) 235-2340 | ||
| Added Comfort, LLC | Oxford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 881-0067 | |
| ADJ of Stamford, Inc. | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 348-6448 | |
| Adolf Krueger Co. Inc. | Bethel | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (203) 743-2255 | |
| Advance HVAC | Branford | CT | 203-444-8076 | |||
| Advance Plumbing & Heating, Inc. | Newington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 232-3053 | |
| Advanced Heating & Air Conditioning, Inc. | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Insulation | (860) 282-0205 | ||
| Advanced Mechanical Services LLC | Farmington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 404-5865 | |
| Advanced Plumbing Services | Stratford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 650-1745 | ||
| Advanced Window Systems, LLC | Berlin | CT | Roofing, Siding, Windows/Doors | Website | (860) 829-8044 | |
| Aegis Solar Energy, Inc. | Branford | CT | Solar, HES audit | Website | (203) 481-2187 | |
| AES Windows & Doors | Fairfield | CT | Windows/Doors | Website | (203) 650-0702 | |
| AF Contracting LLC | Stamford | CT | Masonry | Website | (914) 438-6604 | |
| Affordable Heating & Air Conditioning, LLC | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 581-4892 | |
| Affordable Heating and Cooling, LLC | Wethersfield | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 922-2477 | |
| Affordable Home Repair Service | New Haven | CT | Website | 203-891-6225 | ||
| Aiello Plumbing & Heating | Windsor Locks | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (888) 696-6113 | |
| Air Connections, LLC | Plainville | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | (860) 747-8186 | ||
| Air Experts, Inc. | East Longmeadow | MA | Air/Duct Sealing | Website | (413) 552-0808 | |
| Air Extreme, LLC | Plantsville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 637-0806 | ||
| Air Flo Mechanical, LLC | Colchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 989-5079 | |
| Air On Time, LLC | Old Saybrook | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps | Website | (860)306-9038 | |
| Air Perfect, Inc. | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (203) 878-0878 | |
| Air Specialties Air Conditioning & Heating, Inc. | West Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | (203) 934-7984 | |
| Air Technology Service | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 223-7004 | ||
| Air Temp Mechanical Services, Inc. | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (860) 953-8888 | |
| Air Temp Residential Heating & Cooling | Newington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical | Website | (860) 667-7652 | |
| Air Unlimited, LLC | Wallingford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 238-3213 | ||
| AIR, Inc. | Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, HES audit | Website | (203)303-4822 | |
| Aire Serv Heating & Cooling of Western Connecticut | New Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 717-0563 | |
| Aire Serv of North Central CT | East Windsor | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (860) 627-8830 | |
| Aire Serv of Southwest Connecticut | Derby | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 308-5065 | |
| Aireze Heating and Cooling, LLC | Fairfield | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 367-9897 | |
| AirPlus, Inc. | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | (203) 854-9751 | ||
| AirWise Mechanical LLC | Watertown | CT | 860-670-1698 | |||
| Aitkin Mechanical Services, LLC | Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Plumbing, HES audit | Website | (860) 508-4818 | |
| AJP Electric LLC | Tolland | CT | 860-875-7755 | |||
| AK Mechanical Contractors, LLC | Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 206-3748 | ||
| Al LeBlanc & Son, LLC | West Hartford | CT | Roofing, Siding, Windows/Doors | (860) 402-7966 | ||
| Al's Plumbing and Heating | Orange | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 464-1710 | ||
| Aladdin Inc. | Wallingford | CT | 203-776-9996 | |||
| Alan Powers Heating & Cooling | Ellington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 305-3380 | ||
| Albana Roofing, LLC | Prospect | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (203) 759-1791 | |
| Alberca Construction Co. LLC | Manchester | CT | Hazardous Material Abatement, Masonry, Roofing, Siding | Website | (860) 783-5292 | |
| Albert L. Munroe Jr. Plumbing & Heating, Inc. | Milford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 214-3328 | ||
| Alcraft, Inc. | North Haven | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (203) 980-3424 | |
| Alicki Enterprise Heat & Cool | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 283-1255 | ||
| All American Heating and Air Conditioning, Inc. | Wolcott | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 879-4928 | ||
| All Around Mechanical Services Inc | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 350-3639 | |
| All Green It, LLC | Bristol | CT | Solar, HES audit | Website | (860) 251-7854 | |
| All Makes & Heating A/C Corp. (AMHAC) | Eastchester | NY | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (914) 337-5555 | |
| All Phase Heating & Cooling Contractors, LLC | Moodus | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | (860) 873-9680 | |
| All Phase Heating and Cooling, LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | (203) 927-2829 | ||
| All Phase Remodeling LLC | Windsor Locks | CT | Electrical, Hazardous Material Abatement, Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | (860) 214-1946 | ||
| All Pro Electrical Services, LLC | Meriden | CT | Electrical | Website | (203) 537-1610 | |
| All Pro Heating & Air Conditioning | Ansonia | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | 860-729-5094 | |
| All Pro HVAC LLC | Watertown | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 417-3444 | |
| All Seasons Service, LLC | New Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 921-4724 | ||
| All Service LLC | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, HES audit | Website | (860) 350-0044 | |
| All State Plumbing & Heating, LLC | Danbury | CT | Boilers/Furnaces, Heat Pumps | Website | (203) 994-5202 | |
| All-Time Manufacturing Co. Inc. | Montville | CT | Website | 860-848-9258 | ||
| All-Weather Mechanical, LLC | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 584-2875 | |
| Alliance Heating & Air Conditioning | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 335-9464 | |
| Almighty Plumbing | Middlefield | CT | 860-478-2216 | |||
| Alpha Air Systems, Inc. | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 866-6887 | |
| Alpha Gas | Preston | CT | Website | |||
| Alternative Mechanical Services, LLC | Rocky Hill | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 225-5267 | |
| Alves Insulation | Torrington | CT | Insulation | Website | (860) 618-2529 | |
| AMA Environmental, LLC | Ellington | CT | Hazardous Material Abatement | Website | (860) 926-4476 | |
| American ES, Inc. | New Haven | CT | Insulation | Website | (203) 469-2200 | |
| American Fuel Oil, Inc. | Coventry | CT | Boilers/Furnaces, Heat Pumps | (860) 742-1297 | ||
| American Generic Building Services LLC | Old Mystic | CT | 860-514-9565 | |||
| American Heating Service, LLC | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (203) 756-5040 | |
| American Insulation LLC | Milford | CT | Insulation | 203-878-9169 | ||
| American Windows & Siding, LLC | Manchester | CT | Insulation, Roofing, Siding, Windows/Doors | Website | (877) 410-1227 | |
| AmeriGutter Seamless Gutters LLC | Enfield | CT | Insulation, Siding | Website | (860) 928-5200 | |
| AMG Plumbing Mechanical LLC | New Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (475) 800-2001 | ||
| Amodio & Sons Fuel & Energy Services | West Haven | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 934-2651 | |
| Anchor Insulation Co. Inc. | Norwich | CT | Insulation | Website | (888) 443-5548 | |
| AndAll Tuneski Mechanical LLC | Waterford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 437-8068 | |
| Andersen Oil Co. | Ledyard | CT | ||||
| Andrews Oil & Gas Services | South Windsor | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 528-0766 | |
| Andy's Home Improvement Center, LLC | Bloomfield | CT | Masonry | (860) 242-1163 | ||
| Andy's Oil Service, Inc. | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 756-8969 | |
| Anthem Solar Home Improvement LLC | Wallingford | CT | Solar, HES audit | Website | (203) 901-6543 | |
| Apex Contracting LLC | Baltic | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 367-4207 | ||
| APEX Mechanical LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 621-4373 | ||
| Apex Solar Power, LLC | Queensbury | NY | Electrical, Roofing, Solar | Website | (518) 309-2780 | |
| Appleby Plumbing Co., LLC | Old Saybrook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 399-9101 | |
| Aquila Heating & Cooling, LLC | Fairfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 334-4880 | |
| Arbor Energy | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (203) 272-3250 | |
| ARC Mechanical Services, LLC | Wolcott | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 441-4103 | ||
| Arena Custom Construction, LLC | Milford | CT | Masonry, Roofing, Siding, Windows/Doors | |||
| Around the Clock Heating and Cooling, Inc. | North Haven | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Solar, Tree Removal | Website | (203) 239-2226 | |
| Artisan Building & Remodeling LLC | Middletown | CT | Roofing, Siding | Website | (860) 759-0296 | |
| Artistic Plumbing | Kensington | CT | Masonry, Plumbing | (860) 305-2471 | ||
| ASI Plumbing Heating - Assertive Solutions, Inc. | Goton | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 437-0177 | |
| Associated Mechanical | Winsted | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 302-5585 | ||
| Astacio Plumbing and Heating, LLC | Wilton | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 253-0769 | |
| Atlas Plumbing & Heating LLC | Torrington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 496-9938 | |
| Aubin and Sons Plumbing and Heating | North Grosvenordale | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 935-9933 | |
| Automatic Plumbing & Heating, Inc. | Shelton | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 513-2611 | ||
| Automatic TLC Energy | East Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | 860-528-4328 | |
| AWC Energy | Bloomfield | CT | 860-818-8693 | |||
| B & S Sheetmetal Co., Inc. | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 272-0653 | |
| B.E. Stevenson Plg & Htg LLC | Shelton | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 929-5776 | |
| Bailey Home Improvements | South Windsor | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 454-5048 | |
| Bantam Wesson | Bantam | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Insulation, Plumbing, Windows/Doors | Website | (860) 567-9431 | |
| Baribault Oil Co. Inc. | Oakville | CT | Boilers/Furnaces | Website | (860) 274-3284 | |
| Barr Construction | Willimantic | CT | Plumbing, Roofing, Siding, Windows/Doors | Website | (860) 303-3404 | |
| Barrieau Oil Company, Inc. | West Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 953-6111 | ||
| Bartlett Brainard Products Co. | West Hartford | CT | Roofing, Siding, Windows/Doors | Website | (860) 233-4475 | |
| BDM Mechanical LLC | Guilford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical | (203) 464-4206 | ||
| Beacon Spray Foam, LLC | North Haven | CT | Insulation | Website | (203) 691-6828 | |
| Beckron Heating & Cooling LLC | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (203) 543-8751 | |
| Bella Casa Verde LLC | Waterbury | CT | Masonry, Plumbing, Roofing, Siding, Solar, Windows/Doors | Website | (203-982-1321 | |
| Bellmay Plumbing & Heating, Inc. | Morris | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 567-0880 | ||
| Bender's Oil Service, Inc. | Lebanon | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | Website | (860) 423-6859 | |
| Benedetto Heating & A.C., LLC | Old Lyme | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 434-1574 | ||
| Benjamin Home Service LLC | Wethersfield | CT | 860-888-5946 | |||
| Benvenuti Oil Company, Inc. | Waterford | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 443-6115 | |
| Berkeley Exteriors Inc. | Milford | CT | Masonry, Roofing, Siding, Solar, Windows/Doors, HES audit | Website | (203) 877-4373 | |
| Bernie's Air Conditioning & Heat | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 798-8232 | ||
| Berrios Siding-Roofing and General Contracting | North Haven | CT | Roofing, Siding | (203) 787-5507 | ||
| Best Energy, LLC | Pawcatuck | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 599-1920 | |
| Best Home Performance of CT LLC | Windsor | CT | Air/Duct Sealing, Insulation, HES audit | Website | (860) 373-2803 | |
| Bestech Inc. of CT | Ellington | CT | Hazardous Material Abatement | Website | 8608961000 | |
| Better Building Performance, LLC. | Shelton | CT | Insulation, Masonry, Siding, Windows/Doors, HES audit | Website | (203) 538-5665 | |
| Better Homes Siding & Improvements, LLC | Middlefield | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 305-5003 | |
| Big Dog Mechanical Services LLC | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 620-3021 | ||
| Bill Aitken Heating | North Stonington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 306-0167 | |
| Billy Carlson Heating & A/C, LLC | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, HES audit | Website | (860) 621-0556 | |
| Bioclean, LLC | Milford | CT | Hazardous Material Abatement | Website | 203-283-3912 | |
| Black Bear Spray Foam LLC | Wallingford | CT | Insulation, HES audit | Website | (203) 747-5157 | |
| Blue Flame Oil Co., Inc | New Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 468-2176 | |
| Blue Sky Designs, LLC | Fairfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Masonry, Plumbing, Roofing, Siding, Windows/Doors | Website | (203) 246-6747 | |
| BNB Enterprises LLC | New Britain | CT | Website | 860-888-6757 | ||
| Bob Hofmiller Heating & Cooling LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 466-9149 | |
| Boisvert Plumbing, LLC | East Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 216-9104 | |
| Borselle Plumbing & Heating ,LLC | Newington | CT | Boilers/Furnaces, Plumbing | 8609480510 | ||
| Boss Heating and Cooling | Charlestown | RI | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (401) 326-9505 | |
| Bosse Heating & Air Conditioning, LLC | Plantsville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 620-0687 | |
| Botts Construction Co LLC | Old Saybrook | CT | Masonry | (860) 388-0521 | ||
| Bourque HC Solutions LLC | Windham | CT | 860-617-7767 | |||
| BP Heating & Cooling, LLC | Oxford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (203) 641-5480 | ||
| Brash Restoration, LLC | Wolcott | CT | Insulation, Plumbing, Roofing | (203) 808-2183 | ||
| Bren-Air Heating & Cooling | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 876-9535 | |
| Bria Plumbing & Heating | Bridgeport | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203)365-0004 | |
| Brian Karwosky's Heating & AC, Inc. | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 968-2665 | ||
| Bridgeworks Heating & Cooling LLC | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | 860-747-1888 | |
| Bright Solutions, LLC | Windsor | CT | Insulation, HES audit | Website | (860)719-6771 | |
| Bring The Payne Construction | New Haven | CT | 203-508-3883 | |||
| Britt-Air | Southport | CT | Central Air Conditioning, Heat Pumps, Boilers, Furnaces | Website | (203) 254-0500 | |
| Broad Brook Heating & Cooling, Inc. | Preston | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 887-0147 | |
| Brooks Oil Service, Inc. | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Hazardous Material Abatement, Heat Pumps | Website | (860) 585-1515 | |
| Brothers Oil Company, Inc. | East Hartford | CT | Air/Duct Sealing, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | 860-289-9468 | |
| Brown and Son Plumbing and Heating, LLC | Gales Ferry | CT | Air/Duct Sealing, Boilers/Furnaces, Geothermal, Heat Pumps, Plumbing | (860) 608-2592 | ||
| Brown Roofing Co., Inc. | Beacon Falls | CT | Roofing, Siding | Website | (203) 463-4444 | |
| Brunelli Energy, LLC | Bozrah | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 889-4442 | |
| Bruni and Campisi Plumbing & Heating, Inc. | Elmsford | NY | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Insulation, Plumbing | (914) 946-5558 x106 | ||
| Bryan's Plumbing & Heating, LLC | Bloomfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | (860) 989-1322 | ||
| Builders Unlimited, LLC | Bridgeport | CT | Masonry | (203) 576-8939 | ||
| Bulldog Roofing LLC | Bristol | CT | Masonry, Roofing | Website | (860) 385-1786 | |
| Bullseye Refrigeration & A/C, Inc. | East Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Insulation | Website | (203) 469-4444 | |
| Butler Diversified Services, LLC | Stafford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 458-8032 | ||
| C & G One Hour Heating & A/C, Inc. | Torrington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 482-3400 | |
| C & M Construction | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps, Masonry | Website | (860) 582-0007 | |
| C & N Mechanical, Inc. | Glastonbury | CT | Boilers/Furnaces, Geothermal, Plumbing, HES audit | Website | (860) 243-0877 | |
| C & R Insulation, Inc. | North Franklin | CT | Insulation | Website | (860) 642-4226 | |
| C&S&S Home Improvement | Stratford | CT | Masonry, Roofing, Siding, Windows/Doors | (203) 209-5188 | ||
| C-Clear Windows and Doors | Waterbury | CT | 203-232-1117 | |||
| C-Tec Solar, LLC | Bloomfield | CT | Solar | Website | (860) 580-7174 | |
| C.W. Knight Oil & Heating LLC | N. Windham | CT | Boilers/Furnaces | Website | (860) 455-0658 | |
| CA Trudeau Plumbing & Heating | Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | 203-627-9422 | |
| Call the Bee Heating, Cooling, Plumbing & Electrical, LLC | Farmington | CT | Air/Duct Sealing, Heat Pumps, Plumbing | Website | 860-325-3087 | |
| Call the Plumber, LLC | Trumbull | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 767-5639 | |
| Cameron Plumbing and Heating Mechanical, LLC | Portland | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 342-3750 | ||
| Campbell Cooling, LLC | Newington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | 860-666-2696 | |
| Candlewood Valley Heating & Air Conditioning LLC | New Milford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Roofing | Website | (860) 350-1197 | |
| Canessa Home Improvement Services, LLC | Norwalk | CT | Geothermal, Insulation, Masonry, HES audit | (203) 496-2306 | ||
| Capitol Air | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 878-1700 | ||
| Carlson Heating Air & Hot Water, Inc . | Torrington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 489-4328 | |
| Carmines Plumbing, Heating and Air Conditioning, LLC | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Insulation, Plumbing | Website | (203) 791-8089 | |
| Carnot Heating | Pawcatuck | CT | Boilers/Furnaces, Electrical, Heat Pumps | (860)917-5879 | ||
| Casey Fuel Co. | Ridgefield | CT | ||||
| Casey Propane | Ridgefield | CT | 203-438-6500 | |||
| Casey's Climate Partners | Milford | CT | Air/Duct Sealing, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Plumbing | Website | (203) 263-1068 | |
| Casos HVAC LLC | Colbalt | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 267-5851 | |
| Castle Windows | Mt. Laurel | NJ | Roofing, Siding, Windows/Doors | Website | (800) 360-4400 | |
| Caswell & Sons Contracting LLC | Canterbury | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 428-9335 | ||
| CAWIAMCA LLC | Old Saybrook | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 589-7825 | |
| Cawley Plumbing & Heating | Stonington | CT | Boilers/Furnaces, Heat Pumps, Insulation, Plumbing | Website | (203) 536-2223 | |
| CBS Contractors Heating & Cooling, Inc. | Ansonia | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, HES audit | (203) 734-8015 | ||
| CCRT Services, LLC | Broad Brook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (860) 414-5643 | ||
| CD Builders Inc | Ellington | CT | (860) 875-0067 | |||
| Ceil Plumbing & Heating, Inc. | Pawcatuck | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 599-9000 | |
| Celco Heating & Air Conditioning | Bridgeport | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 371-0055 | |
| Certified Construction LLC | Rocky Hill | CT | Electrical, Insulation, Masonry, Roofing, Siding, Windows/Doors | (860) 982-7465 | ||
| CES Danbury Solar, LLC | Valhalla | NY | ||||
| Charter Oak Envioronmental, LLC | Milford | CT | Hazardous Material Abatement | Website | (860) 225-6090 | |
| Charter Oak Mechanical Services, LLC | Manchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 432-8915 | |
| Chase Mechanical, LLC | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 307-6575 | ||
| Chernin HVAC & Refrigeration LLC | Waterbury | CT | Central Air Conditioning, Heat Pumps | (781) 367-6519 | ||
| Chiarillo's HVAC & Plumbing | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 585-8139 | |
| Chickos Energy Services | Milford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 882-0177 | |
| Chillie Willie Heating & A/C LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | (203) 253-3235 | ||
| Chimney Care Professional, Inc. | Jewett City | CT | Masonry | Website | (860) 376-3393 | |
| Circle Energy Services, Inc | New Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Masonry, Plumbing, Roofing, Windows/Doors | Website | (860) 946-4047 | |
| CLG Electric LLC | Somers | CT | Electrical | Website | (860) 698-9148 | |
| Climate Masters LLC | Clinton | CT | 203-907-5833 | |||
| Climatech, Inc. | Wallingford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (203) 269-1600 | |
| Clog Master LLC | Bristol | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 709-8427 | |
| CMC Energy Services, Inc. | Yalesville | CT | Insulation, Windows/Doors, HES audit | Website | (203)774-4059 | |
| CMH Construction LLC | Trumbull | CT | 203-895-0757 | |||
| CNM Heating, Cooling & Piping, LLC | Storrs | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 933-2085 | |
| Coastline Mechanical Services, LLC | West Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 671-1267 | ||
| Cobra Heating & Cooling, LLC | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 257-6032 | |
| Cole Heating & Cooling, Inc. | Seymour | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 888-0376 | |
| Cole Mechanical, LLC | Woodbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 948-0564 | |
| Collins & Co. | East Windsor | CT | Insulation, Masonry | Website | (860) 870-9803 | |
| Colonial Carpentry Innovations, Inc. | South Hadley | MA | Masonry | Website | (413) 322-9031 | |
| Comfort Solutions Heating and Cooling, LLC | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical | Website | (860) 620-2786 | |
| Comfort Specialists Heating & Cooling, LLC | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 272-3855 | ||
| Comfort Zone Heating & Coolin LLC | Watertown | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | (860) 274-1974 | ||
| Complete Climate Control LLC | Enfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 978-5085 | |
| Complete Comfort Heating & Cooling, LLC | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 609-5066 | |
| Conditioned Air Systems, Inc. | Hamden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | (203) 230-2121 | ||
| Connecticut Air Systems | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 877-4070 | |
| Connecticut Cleaning & Heating Equipment Inc. | Simsbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, HES audit | Website | (860) 651-9116 | |
| Connecticut Cooling and Heating, Inc. | Bloomfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Roofing | Website | (860) 242-6295 | |
| Connecticut Environment Control, LLC | Westbrook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 399-6000 | ||
| Connecticut Home Services, Inc. | West Hartford | CT | Air/Duct Sealing, Central Air Conditioning, Insulation, Roofing, Siding | Website | (860) 529-4000 | |
| Connecticut Home Solutions, LLC | Wallingford | CT | Air/Duct Sealing, Insulation | Website | (800) 621-2965 | |
| Connecticut Hydronics LLC | Naugatuck | CT | Geothermal | (203) 233-0797 | ||
| Connecticut Roofcrafters LLC | West Haven | CT | Roofing | Website | (203) 745-5028 | |
| Connecticut Wells & Geothermal Services, Inc. | Bethlehem | CT | Geothermal | Website | (203) 266-5272 | |
| Contracting USA, LLC | Rocky Hill | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Masonry, Plumbing, Roofing, Windows/Doors | Website | (860) 474-5144 | |
| Controlled Temperatures, Inc | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (203) 348-9141 | |
| Cool Heat Mechanical, Inc. | East Granby | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (860) 883-1837 | ||
| Copper Valley Heating & Cooling, LLC | Meriden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 599-0401 | ||
| Corbett HVAC Services, LLC | North Windham | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | (860) 942-0183 | ||
| Cordone & Tonucci, Inc. | Orange | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | 2036248871 | |
| Cordova Plumbing & Heating | Southbury | CT | 203-264-4112 | |||
| Cornwall Plumbing & Heating, LLC | Cornwall Bridge | CT | Boilers/Furnaces, Heat Pumps, Plumbing, Solar | Website | (860) 672-6350 | |
| Coughlin Service Corp | Middletown | CT | Masonry | Website | (860) 704-0425 | |
| Countywide Mechanical Services LLC | Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 316-2299 | |
| Cousins Oil Co, Inc. | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (860) 584-1000 | |
| Craftwork Contractors | Hartford | CT | Roofing, Siding, Windows/Doors | Website | (860) 726-3820 | |
| Creative Building | Bethel | CT | Masonry | (203) 994-0430 | ||
| Cromwell Energy, Inc. | Cromwell | CT | Air/Duct Sealing, Central Air Conditioning | Website | (860) 635-1234 | |
| Cronus Construction, LLC | New Britain | CT | Masonry | (860) 888-2788 | ||
| Crown Point Heating and Cooling | Lebanon | CT | Website | 860-336-9132 | ||
| CT Asbestos Abatement LLC | West Haven | CT | Hazardous Material Abatement | Website | (203) 376-7043 | |
| CT Electrical Services / CT Solar Services | Beacon Falls | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Insulation, Masonry, Plumbing, Roofing, Siding, Solar, HES audit | Website | (203) 723-9052 | |
| CT Hydromechanical | Shelton | CT | 2034496754 | |||
| CT Professional Painting LLC | Windsor | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 402-7453 | ||
| CT Weatherproof Insulation LLC | Stratford | CT | Insulation | Website | (203) 813-1597 | |
| Curley's Fuel | Windsor | CT | Boilers/Furnaces | (860) 688-8870 | ||
| Currie's Plumbing Heating & Cooling, Inc. | Oakdale | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | (860) 859-3533 | |
| Cusson Sash Company, Cusson Realty, LLC | Glastonbury | CT | Windows/Doors | Website | (860) 659-0354 | |
| Custom Air Solutions, LLC | Rocky Hill | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 921-7853 | ||
| Custom Air Systems, Inc. | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (203) 333-1906 | |
| Custom Ventilation LLC | Willington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 429-2805 | |
| D & D Heating & Air Conditioning, LLC | Somers | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal | Website | (860) 698-9696 | |
| D & H Mechanical Service LLC | Tolland | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 983-0802 | |
| D & S Comfort Control | Coventry | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps | (860) 729-6697 | ||
| D&V Mechanical Inc. | Westerly | RI | 401-741-2704 | |||
| Dacosta Spray Foam Insulation LLC | Bridgeport | CT | 203-482-2595 | |||
| Dal Fuel Oil Co., LLC | Naugatuck | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 758-8682 | |
| Dal Remodeling LLC | Manchester | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | (860) 432-5850 | ||
| Dalia Home Improvement Corporation | Bridgeport | CT | (203) 540-2387 | |||
| Dalling Heating & Air Conditioning, LLC | Shelton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 231-3943 | ||
| Dandelion Energy, Inc. | Peeksill | NY | Geothermal, Heat Pumps | Website | (833) 436-4255 | |
| Daniel J. Symolon, LLC | Burlington | CT | (860) 916-0277 | |||
| Daniels Energy | Portland | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps | Website | (860) 813-9125 | |
| Davila's Mechanical Services LLC | Manchester | CT | 860-989-8252 | |||
| DC Corp Including CEM LLC | North Haven | CT | 203-287-8738 | |||
| DDLC Energy | New London | CT | Central Air Conditioning, Heat Pumps, Plumbing | Website | 866-297-8038 | |
| DeBow Mechanical Services, LLC | Wethersfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Masonry, Plumbing, Solar | Website | (860) 956-8716 | |
| DEF Services Group, Ltd | Griswold | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | Website | (860) 376-4896 | |
| Degree Heating, AC & Mechanical Services | West Simsbury | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 408-1113 | |
| Degree Inc. | Glastonbury | CT | Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 633-6122 x105 | |
| Deitch Energy, LLC | Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Plumbing | Website | (860) 728-5431 | |
| DeMarco Plumbing Company | Danielson | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | |||
| Dempsey Mechanical | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 377-8336 | ||
| Densmore Oil Company | Stonington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 536-7927 | |
| DePco Mechanical LLC | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Plumbing | Website | (860) 747-0079 | |
| Dependable Energy, Inc. | Prospect | CT | Boilers/Furnaces, Geothermal, Heat Pumps, HES audit | Website | (203) 758-5831 | |
| Dependable Heating & Cooling, LLC | North Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 488-8006 | ||
| Designed Air Systems, LLC | East Hampton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 839-2021 / (860) 992-5137 | ||
| Desirable Heating and Cooling | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 673-5152 | ||
| DiGiorgi Roofing & Siding, Inc. | Beacon Falls | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (203) 723-6880 | |
| DiMartino Home Improvement Inc. | North Haven | CT | Masonry, Siding, Windows/Doors | Website | (203) 239-0558 | |
| Direct Energy Solar | Columbia | MD | Solar | Website | (410) 271-8194 | |
| Direct Home Services | Middlefield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (860) 339-6001 | ||
| DJ Hall Roofing, LLC | Torrington | CT | Roofing | Website | (860) 626-5300 | |
| Dj Russo Services | Guilford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (203) 453-9140 | ||
| DM Remodeling | Groton | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (860) 213-3459 | |
| DME Ductless and HVAC | Southbury | CT | 2035869026 | |||
| Dominick Fuel, Inc. | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 866-5836 | |
| Don's Heating & Cooling Solutions, LLC | Ellington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | (860) 872-0586 | ||
| Donnelly Heating & A/C Maintenance, Inc. | Bethel | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 744-1045 | ||
| Douglas Mechanical Services, Inc. | Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 357-4952 | |
| Douglas Plumbing, Heating & A/C LLC | Farmington | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | (860) 677-4522 | ||
| Dr. Energy Saver - Eco Energy Solutions, LLC - Windsor | Windsor | CT | Insulation, Windows/Doors, HES audit | Website | (860) 219-0499 | |
| Dr. Energy Saver - Seymour | Seymour | CT | Air/Duct Sealing, Central Air Conditioning, Insulation, Masonry | Website | (800) 541-0487 | |
| Ductless Homes, LLC | North Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 208-1398 | |
| Ductworks HVAC Services | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 621-6295 | |
| Duncklee, Inc. | Stonington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 535-2552 | |
| Dutch Oil Co, Inc. | Moodus | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (860) 873-3876 | |
| Dwyer Family Fuel | Old Saybrook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 388-1867 | |
| Dynamic Building & Energy Solutions | North Stonington | CT | Insulation, Masonry, Siding, Windows/Doors | Website | (860) 535-8118 | |
| Dynamic Engineering | Hampton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Hazardous Material Abatement, Heat Pumps, Insulation, Masonry, Plumbing, Roofing, Siding, Solar, Tree Removal, Windows/Doors, HES audit | (860) 705-7308 | ||
| Dynamic Mechanical Heating & Air Conditioning LLC | Plainville | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 589-8367 | |
| Dzen Residential Roofing LLC | South Windsor | CT | Roofing, Siding | Website | (860) 289-1663 | |
| E & M Heating & Cooling, LLC | West Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 915-3672 | ||
| E.J. Chasse Home Repairs & Improvements | Portland | CT | Masonry, Plumbing, Roofing, Siding, Windows/Doors | (860) 342-1942 | ||
| Earthlight Technologies, LLC | Ellington | CT | Solar | Website | (860) 871-9700 | |
| East Coast Insulation, LLC | Thomaston | CT | Insulation | (203) 982-1188 | ||
| East Coast Mechanical, Inc. | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | 2032726676 | |
| East Coast Wall Systems, LLC | Middletown | CT | Masonry | Website | (860) 296-0728 | |
| East Hartford Heating and Cooling, LLC | East Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 290-9625 | |
| East River Energy, Inc. | Guilford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 453-1200 | |
| Eastern Conn. Heating | Canterbury | CT | 860-753-0731 | |||
| Eastern CT Solar LLC | North Stonington | CT | Solar | Website | (860) 389-6736 | |
| Eastern Fuel Corporation | Hamden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 248-2111 | |
| Eastern Mechanical Services, Inc. | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps | Website | (203) 792-7668 | |
| Eastside Electric Inc. | Harwinton | CT | Boilers/Furnaces, Central Air Conditioning, Electrical | Website | (860) 485-0700 | |
| Eazy Contracting LLC | Meriden | CT | 860-881-5847 | |||
| ECO Energy Guard LLC | Collinsville | CT | Insulation | Website | (860) 690-5465 | |
| Eco Home Comfort Systems, LLC | Goshen | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 644-3845 | |
| EcoLogic Energy Solutions LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, HES audit | Website | (203) 889-0505 | |
| EcoSmart Home Services, Inc. | East Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Insulation, Solar | Website | (860) 828-6626 | |
| ECS Aeroseal LLC | Southbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, HES audit | Website | (203) 262-1064 | |
| Ed Amoroso | Harwinton | CT | Windows/Doors | (860) 482-4162 | ||
| Ed Blesso Plumbing & Heating, Inc. | Pine Meadow | CT | Boilers/Furnaces, Heat Pumps | (860) 690-7190 | ||
| Eddie's Quality Home Improvements | Rocky Hill | CT | Masonry | (860) 796-9796 | ||
| Eden Contractors LLC | East Hartford | CT | Insulation, Masonry, Roofing, Siding | (617) 318-7339 | ||
| Edgerton, Inc. | Monroe | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (203)2686279 | |
| Effective Plumbing, LLC | Norwalk | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203)855-9465 | ||
| Efficient Heating & Cooling, Inc | Stamford | CT | 203-323-8740 | |||
| Ehman Mechanical Services, LLC | Ansonia | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 410-8729 | ||
| Elite Heating and Cooling, LLC | Derby | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 516-5595 | ||
| Elite Systems, LLC | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 280-5719 | ||
| Elm City Energy Solutions, LLC | New Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Insulation, Plumbing, Roofing, Siding | Website | (203) 387-2885 | |
| EmVee Mechanical LLC | Ellington | CT | 860-899-6858 | |||
| Enco Environmental Contracting & Demolition, LLC | Waterbury | CT | Hazardous Material Abatement | Website | 203-754-5959 | |
| ENCON, Inc. | Stratford | CT | Boilers/Furnaces, Central Air Conditioning, Solar | Website | (203) 375-5228 | |
| Energy Air | Guilford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | Website | (203) 453-8354 | |
| Energy Efficiencies Solutions LLC | Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Insulation, Windows/Doors, HES audit | Website | (860) 580-9076 | |
| Energy Nerds LLC | New Britain | CT | Air/Duct Sealing, Insulation, HES audit | Website | (860) 837-1598 | |
| Energy Resource Group Technologies, Inc | Northford | CT | Air/Duct Sealing, Insulation, HES audit | Website | (203) 484-2594 | |
| Energy Saver & Convenience LLC | Moosup | CT | Insulation, Roofing, Siding, Windows/Doors | (860) 305-7443 | ||
| Energy Spray Systems LLC | Stamford | CT | Insulation | Website | (203) 536-3388 | |
| Energy Star LLC | Wolcott | CT | 203-509-6368 | |||
| Energy Unlimited, LLC | Manchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (860) 643-8334 | |
| Energy Vectors, LLC | Manchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 653-6318 | |
| Environmental Services, Inc. | South Windsor | CT | Hazardous Material Abatement | Website | (860) 528-9500 | |
| Environmental Systems Corporation | West Hartford | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 953-8800 | |
| Eric Sabo Plumbing Heating & Cooling, LLC | Canterbury | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 608-4610 | |
| Evergreen Mechanical LLC | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 819-6798 | |
| Evolution Air, LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 724-9814 | ||
| Exteriors of CT, LLC | Glastonbury | CT | Roofing, Siding, Windows/Doors | Website | (860) 657-2038 | |
| F & A Contracting LLC | Goshen | CT | Masonry | (203) 948-1905 | ||
| F. Panza Company LLC | West Haven | CT | Masonry | (203) 934-1000 | ||
| F.F. Hitchcock Co., Inc. | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 272-5400 | |
| F.J. Chard and Son, Inc. | Burlington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 675-8086 | |
| F.R.L. Mechanical | Higganum | CT | Plumbing | (203) 537-1169 | ||
| Fahrenheit Mechanical Services, Inc. | Broad Brook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 623-1991 | |
| Fairfield County Exteriors LLC | Stratford | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (203) 375-9700 | |
| Fairfield County Restoration | Norwalk | CT | Masonry, Roofing, Windows/Doors | Website | (203) 838-5858 | |
| Fairgrounds Heating and A/C LLC | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | (203) 994-4315 | ||
| Farmington Valley Home Services, LLC | Goshen | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (860) 480-2545 | ||
| Father and Son Masonry | Waterford | CT | Masonry | (203) 437-6390 | ||
| Fazzino Plumbing & Heating, Inc. | Naugatuck | CT | Boilers/Furnaces, Heat Pumps | Website | (203) 490-4637 | |
| FDX Restoration Inc | Norwalk | CT | Hazardous Material Abatement, Mold Remediation | 2038568253 | ||
| Finestra Rossa Windows | West Hartford | CT | Roofing, Windows/Doors | Website | (860) 986-2696 | |
| Finman Windows, LLC | Farmington | CT | Windows/Doors | Website | (860) 677-9300 | |
| Fire & Ice Heating & Air Conditioning | North Granby | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 982-0638 | ||
| Fire Finesse, LLC | Wethersfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Masonry | Website | (860) 529-3473 | |
| Firehouse Discount Fuels LLC | Burlington | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 485-5224 | |
| First Choice Home Services, LLC | Stafford Springs | CT | Boilers/Furnaces, Heat Pumps, Masonry, Plumbing | Website | (860) 684-3006 | |
| Fitzgerald & Wood Inc. | Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 488-2553 | |
| Fitzpatrick Heating & A/C, LLC | Haddam | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 345-7466 | ||
| Foleys Plumbing & Heating, LLC | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 797-1626 | |
| Fontaine Mechanical Heating & A/C | Bristol | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 589-4900 | |
| For U Builders Group, LLC | Morris | CT | Insulation, Masonry, Windows/Doors | Website | (914) 582-3169 | |
| Foremost Mechanical Services, LLC | East Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 758-4218 | ||
| Four Seasons Chimney & Roofing, LLC | Watertown | CT | Masonry, Roofing, Siding | Website | (866) 747-7778 | |
| Fox Heating Services, Inc. | Tolland | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 684-9113 | |
| Fritz Air LLC | Harwinton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 459-5207 | ||
| Fritz's Heating and Cooling, LLC | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 372-9460 | |
| Fusco Bros. Oil | Windsor Locks | CT | Boilers/Furnaces, Central Air Conditioning | (860) 688-5234 | ||
| Future Mechanical, LLC | New Britain | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 989-7711 | |
| G & G Mechanical | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 565-7879 | ||
| G & S Heating and Cooling | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal | (203) 218-3325 | ||
| G.J. Giacco, Inc. | Meriden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 235-0840 | |
| Galaski Mechanical LLC | North Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (203) 641-0452 | ||
| Gallagher Custom Carpentry, LLC | Sandy Hook | CT | Masonry, Windows/Doors | (203) 448-8083 | ||
| General Oil of Quaker Hill, Inc. | Quaker Hill | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 443-1306 | |
| George Usaty & Sons Heating & Cooling | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 948-0561 | |
| Geothermal Works Inc. | New Rochelle | NY | 914-960-2004 | |||
| Giordano's Heating & Air Conditioning Co., LLC | Derby | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (203) 734-7648 | |
| Glasco Heating & Air Conditioning, Inc. | South Windsor | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing, Boilers, Furnaces | Website | (860) 289-5509 | |
| Glass, Glazing & Home Improvement | New Haven | CT | Windows/Doors | Website | (203) 468-0964 | |
| Glastonbury Burner & Boiler | Glastonbury | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 659-4120 | |
| GMAC Plumbing & Heating LLC | Vernon | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 543-2730 | |
| GMS Home Improvements | Suffield | CT | Masonry | (860) 930-0699 | ||
| Gold Shield Construction | Berlin | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 438-7530 | ||
| Gonalc Mechanical Service | Torrington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 601-5076 | |
| Good Life Energy Savers, LLC | Danbury | CT | Insulation, HES audit | Website | (203) 403-6351 | |
| Gottier Plumbing & Heating | Vernon | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 875-0719 | |
| Grade A Home Improvement, LLC | Middlefield | CT | Website | (860) 874-4848 | ||
| Green Apple Spray Foam LLC | Guilford | CT | Air/Duct Sealing, Insulation | Website | (203) 464-3312 | |
| Green Earth Energy Photovoltaic | East Windsor | CT | Solar | Website | (860) 808-7115 | |
| Green Energy Saver, LLC | Canton | CT | Insulation | Website | (860) 693-8289 | |
| Green Home Solutions | Old Lyme | CT | Hazardous Material Abatement | Website | (860) 418-7588 | |
| Green Mechanicals Heating & Cooling | Stamford | CT | 203-243-4925 | |||
| Green Power Energy LLC | Annadale | NJ | 903-713-9055 | |||
| Greg Swanson | Avon | CT | Insulation, Masonry, Plumbing, Siding, Windows/Doors | (860) 992-4548 | ||
| Greg's Plumbing & Heating, LLC | New London | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 460-0670 | ||
| Greystone Home Services, LLC | East Hartford | CT | Insulation, Windows/Doors | Website | (860) 748-6830 | |
| GSE Home Services, LLC | Branford | CT | Insulation | Website | (203) 518-8354 | |
| GT Plumbing, Heating and Cooling, LLC | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 956-9851 | |
| Guarantee Mechanical Services, Inc. | Broad Brook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | (860) 627-9368 | ||
| Gulick Building & Development, LLC | Bridgeport | CT | Insulation, Windows/Doors | Website | (203) 583-4567 | |
| Gutowski Central Heating | New Britain | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (877) 229-8529 | |
| Guys Heating & Cooling | Watertown | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 417-6553 | |
| H. Hulse Heating & Air Conditioning | Stratford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 380-2692 | |
| H2O Services, LLC | Stamford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 273-0764 | |
| Hanco Plumbing & Heating, LLC | Tolland | CT | Boilers/Furnaces, Plumbing | (860) 872-4706 | ||
| Handyman Express Energy Solutions, LLC | Stratford | CT | HES audit | Website | (203) 307-5395 | |
| Harisi Energy LLC | Watertown | CT | 4759990080 | |||
| Harmony Home Improvement | South Windsor | CT | Roofing, Siding, Windows/Doors | Website | (860)645-8899 | |
| HARP Home Services LLC | Windsor | CT | Air/Duct Sealing, Central Air Conditioning, Electrical, Geothermal, Hazardous Material Abatement, Heat Pumps, Insulation, Masonry, Roofing, Siding, Solar, Tree Removal, Windows/Doors | Website | (860) 544-2723 | |
| Hartland Homes, LLC | West Hartland | CT | Roofing, Siding, Windows/Doors | (860) 309-3367 | ||
| Haz-Pros, Inc. | West Hartford | CT | Hazardous Material Abatement | Website | (800) 828-6343 x7 | |
| Hefferon Heating & Cooling LLC | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | Website | (203) 790-8826 | |
| Helio Solar LLC | Shelton | CT | 203-200-0364 | |||
| Hellas Air Temp., Inc. | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 246-1783 | |
| Heritage Home Restoration LLC | Cornwall | CT | Masonry | Website | (860) 994-2534 | |
| Heritage Oil, Inc. | Willington | CT | Central Air Conditioning, Heat Pumps, Plumbing, Boilers, Furnaces, Air source/Ground source Heat Pump, High efficiency boiler, High efficiency furnace, Heat Pump water heater, Indirect water heater-Natural Gas, Natural Gas Storage/Condensing Water Heater, Natural Gas Conversion Furnace, Replacement Natural Gas Furnace/Boiler, Replacement Oil/Propane Furnace/Boiler, Replacement Hot Water Heater, Replacement Central Air Conditioning, Gas Conversion/Boiler, Gas Conversion/Furnace, Natural Gas Boiler Replacement, Natural Gas Furnace Replacement, Tankless Natural Gas Hot Water Heater Replacement, Natural Gas Boiler, Natural Gas Furnace | 8604290259 | ||
| Hi Ho Petroleum | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | 2033350101 | |
| High Performance Energy Solutions, LLC | Brookfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (203) 297-2529 | |
| Highland Window Company, LLC (The) | West Hartford | CT | Siding, Windows/Doors | Website | (860) 233-7100 | |
| Highwood Mechanical LLC | Hamden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | 203 288-3315 | ||
| Hillcrest Heating & Air Conditioning | Ansonia | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 735-1847 | ||
| Hipoint Heating Cooling, Inc. | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 291-0181 | |
| HM Construction Services LLC | Fairfield | CT | Roofing, Siding, Windows/Doors | (203) 373-1362 | ||
| Hocon Gas, Inc. | Shelton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | ||
| Hoffman Energy | Trumbull | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, HES audit | Website | (800) 637-2239 | |
| Hogan's Handyman Services, LLC | Oxford | CT | Masonry | Website | (203) 888-6042 | |
| Homa Home Improvement, LLC | Fairfield | CT | Masonry, Roofing, Siding, Solar, Windows/Doors | Website | (203) 368-3255 | |
| Home Comfort Heating and Cooling Solutions, LLC | East Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 290-1005 | |
| Home Comfort Practice, LLC | Stratford | CT | Air/Duct Sealing, Insulation, Roofing, Siding, Windows/Doors, HES audit | Website | (203) 450-3000 | |
| Home Designs by Bruno | Colchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Masonry, Plumbing, Roofing, Siding, Solar, Windows/Doors | Website | ||
| Home Doctor of America | Sandy Hook | CT | Insulation, Siding, Windows/Doors | Website | (203) 364-7390 | |
| Home Heating & Air Conditioning, LLC | West Haven | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 932-5484 | |
| Homeguard Environmental | Stamford | CT | Hazardous Material Abatement | Website | (203) 323-8000 | |
| Homestead Fuel, Inc. | Ellington | CT | Boilers/Furnaces, Hazardous Material Abatement, Heat Pumps | Website | (860) 870-8700 | |
| HomeTown Heating & Cooling | Avon | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 539-5528 | ||
| Hometown Plumbing & Heating | Monroe | CT | Boilers/Furnaces, Plumbing | Website | 203-452-7561 | |
| Horvath Plumbing and Heating, LLC | Stamford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 561-1150 | |
| House Bros Plumbing Contractors, Inc. | Glastonbury | CT | Boilers/Furnaces, Plumbing | Website | (860) 659-0055 | |
| HR Heating Services, LLC | East Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | (860) 573-2403 | ||
| Hudson Valley Preservation Corporation | Kent | CT | 8605920500 | |||
| Husky Fuel | Oxford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 783-0783 | |
| Husky Windows | Bolton | CT | Siding, Windows/Doors | Website | (860) 600-0456 | |
| Hybrid Services LLC | Woodstock | CT | 844-484-4927 | |||
| Hydro Dynamic Engineering, LLC | Southington | CT | Geothermal, Heat Pumps | (860) 628-4622 | ||
| Hygrade Gas Service, Inc. | Stafford Springs | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 749-8035 | |
| Hygrade Mechanical Services LLC | West Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 918-3068 | ||
| Hyper Fusion Heating & Cooling LLC | Shelton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (203) 895-5829 | |
| Hyper Heating & Cooling LLC | New Britain | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 966-5717 | |
| Hytek Plumbing & Heating LLC | Preston | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 389-1122 | ||
| i-HVACR, LLC | Manchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | ||
| Ideal Mechanical Services, LLC | Tolland | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | (860) 368-7625 | ||
| Imperial Plumbing Co. | South Windsor | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 291-0115 | |
| Incredible Oil, LLC | Wallingford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 265-4328 | |
| Independent Insulation | Enfield | CT | Insulation | Website | (860) 899-9041 | |
| Independent Mechanical Inc. | Uncasville | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps | (860) 949-4401 | ||
| Indoor Comfort Heating & Cooling LLC | East Haven | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 507-8411 | ||
| Innovative Heating & Cooling LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 283-7272 | ||
| Insulation Solutions of CT, LLC | East Hartford | CT | Air/Duct Sealing, Insulation, Siding, Windows/Doors | Website | (860) 586-8111 | |
| Integrity Home Services LLC | Fairfield | CT | Roofing | Website | (203) 403-2111 | |
| Integrity HVAC Systems LLC | Griswold | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 949-5436 | |
| Ion Solar Pro's LLC | Wolcott | CT | 860-565-0000 | |||
| Ireland Oil Co., Inc. | Vernon | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 875-1906 | |
| Irie Energy Heating & Cooling | Niantic | CT | Heat Pumps, Boilers, Furnaces | 8603341823 | ||
| Island Mechanical, LLC | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | (860) 338-4440 | ||
| Ives Brothers, Inc. | Willimantic | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 423-6381 | |
| Ivy Roofing Contractor LLC | Ledyard | CT | Roofing, Siding, Windows/Doors | Website | (860) 625-2727 | |
| J & A Construction, LLC | Hamden | CT | ||||
| J & A Construction, LLC | Avon | CT | Masonry | Website | (860) 675-4344 | |
| J & A Waterville Oil Service Inc. | Naugatuck | CT | Boilers/Furnaces, Heat Pumps | Website | (203) 729-5216 | |
| J & J Rivera Home Improvement | Old Saybrook | CT | Masonry, Roofing, Siding, Windows/Doors | Website | ||
| J & M Plumbing and Heating LLC | Bantam | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 567-0508 | ||
| J & S Remodeling, LLC | Bristol | CT | Windows/Doors | (860) 919-6725 | ||
| J Socci Plumbing & Heating | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 569-3996 | |
| J&J Silver City Remodeling | Meriden | CT | Roofing, Siding, Windows/Doors | 203-715-8156 | ||
| J. Gasper Heating and Air Conditioning | Torrington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 496-0101 | |
| J. Marasco Heating & Cooling LLC | Norwalk | CT | Boilers/Furnaces, Central Air Conditioning | (203) 866-4421 | ||
| J. Serenson Heating & Cooling, LLC | Thomaston | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 637-0080 | |
| J. Signor Exteriors, LLP | West Hartford | CT | Roofing, Siding, Windows/Doors | Website | (860) 232-3227 | |
| J. Thurston Fuel LLC | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps | Website | (203) 753-4328 | |
| J.A.B. Remodeling LLC | Canaan | CT | Roofing, Siding, Windows/Doors | (860) 671-0335 | ||
| J.C. Tonnotti Window Co. Inc. | Southington | CT | Roofing, Siding, Windows/Doors | Website | (860) 621-1642 | |
| J.D. Heating LLC | Newton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 648-0238 | ||
| J.M. Cipriano & Sons, LLC | Prospect | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 758-3770 | |
| J.P. Dunn Heating & Cooling, LLC | Northfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 283-1167 | |
| J.P. Spinella Heating and Cooling | Wolcott | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 982-3179 | |
| J.R. Roofing | Norwalk | CT | Roofing | Website | (203) 952-8653 | |
| J.T. Burke & Sons, Inc. | East Hartford | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 289-9381 | |
| James Carboni Plumbing & Heating Inc. | North Franklin | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 642-7847 | |
| Jasinski Fuel Service, LLC | Harwinton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 605-9039 | |
| Jays Sheet Metal | Ledyard | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 237-0234 | ||
| JB Mechanical LLC | Marlborough | CT | 860-918-4129 | |||
| JC Construction & Renovations LLC | Manchester | CT | Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | (860) 416-6055 | ||
| JC Construction Service, LLC | Danbury | CT | Roofing, Siding | (203) 648-6919 | ||
| JCO Plumbing & Heating, LLC | Canaan | CT | Boilers/Furnaces, Heat Pumps, Insulation | (860) 309-1679 | ||
| JD Solar Solutions LLC | Bolton | CT | Roofing, Solar | Website | (860) 717-0786 | |
| JD's Home Improvements | Berlin | CT | Roofing, Siding, Windows/Doors | (860) 614-2568 | ||
| JDL Air Systems LLC | Norwalk | CT | Boilers/Furnaces, Central Air Conditioning | (203) 866-2259 | ||
| Jeff Nadeau Const. | South Windsor | CT | Masonry | (860) 944-4442 | ||
| Jefferson Plumbing & Heating | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Heat Pumps, Plumbing | |||
| JEM Plumbing & Heating, Inc. | Hamden | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 287-5636 | |
| Jennings Propane Company | Danbury | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 790-1406 | |
| JFM Services | East Hartford | CT | Masonry, Roofing, Windows/Doors | (860) 502-4583 | ||
| Jim Pescatore Home Improvement, LLC | Torrington | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 866-4200 | |
| Jim's Plumbing & Heating, LLC | Enfield | CT | Boilers/Furnaces, Plumbing | (860) 745-5271 | ||
| Jimco Windows | Waterbury | CT | Windows/Doors | (203) 756-7373 | ||
| JJ Sullivan Oil & Propane | Guilford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 453-2781 | |
| JL Mechanical Services LLC | Enfield | CT | 860-690-0320 | |||
| JLP Heating & Cooling LLC | Norwalk | CT | Website | 203-524-0297 | ||
| JMC Plumbing, LLC | Newtown | CT | Air/Duct Sealing, Boilers/Furnaces, Geothermal, Heat Pumps, Plumbing | (203) 788-4157 | ||
| JMN Home Improvement | East Hartford | CT | Masonry, Roofing, Windows/Doors | |||
| Joe Tassitano Plumbing & Heating Co. | Shelton | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 924-1774 | ||
| Joe the Plumber | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Masonry, Plumbing, Siding, Windows/Doors | Website | (860) 614-7157 | |
| Joe's Home Improvement, LLC | East Windsor | CT | Roofing, Siding, Windows/Doors | (860) 904-3845 | ||
| John C. Fiderio & Sons, Inc. | Meriden | CT | Insulation, Plumbing, Roofing, Siding, Windows/Doors | Website | (203) 237-0350 | |
| John's Plumbing & Heating, LLC | Bloomfield | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 242-4909 | ||
| Jones Heating Service, LLC | Willington | CT | Boilers/Furnaces, Heat Pumps | (860) 428-1240 | ||
| Jordans Heating Cooling LLC | Hamden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 230-2194 | ||
| Joseph Abbate Plumbing & Heating Contractor Inc. | Hartford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 527-0086 | ||
| JP Carroll Roofing | West Hartford | CT | Roofing, Siding, Windows/Doors | Website | (860) 586-8857 | |
| JP Heating & Cooling, LLC | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203)385-3837 | |
| JP Parks Heating and Cooling LLC | Woodbury | CT | Central Air Conditioning, Boilers, Furnaces, Ductless mini-split heat pump, Heat Pump water heater | Website | 203-560-6795 | |
| JPL Construction Corp. | Pascog | RI | Boilers/Furnaces, Heat Pumps | (401) 699-5457 | ||
| JPW Building, LLC | Canterbury | CT | Masonry, Roofing | Website | (860) 546-6292 | |
| JR Heating & Cooling, LLC | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 793-2686 | |
| JRS Building & Remodeling | Naugatuck | CT | Air/Duct Sealing, Hazardous Material Abatement, Insulation, Roofing, Siding, Windows/Doors, HES audit | Website | (203) 729-0403 | |
| JT Home Services LLC | Sherman | CT | 203-809-6809 | |||
| Juan-Co Plumbing, LLC | Waterford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 625-4071 | ||
| Just Right Heating & Cooling, LLC | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 617-9088 | |
| Justin Nuno HVAC & Plumbing LLC | North Windham | CT | 959-444-6688 | |||
| JV Mechanical Contractors, Inc. | Webster | MA | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (508) 943-3222 | |
| Karol Construction LLC | New Britain | CT | Roofing, Siding | (860) 518-1091 | ||
| Kawalec Plumbing & Heating, LLC | Tolland | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 573-6154 | ||
| Keith Heating & Cooling LLC | Danielson | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 377-0116 | ||
| Kelley's Heating & Coolong LLC | New Milford | CT | 860-717-4226 | |||
| Kellner Plumbing & Heating LLC | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 436-6824 | |
| Kenair LLC | East lyme | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 235-6743 | ||
| Kennedy's Plumbing & Heating | Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Insulation, Plumbing, Roofing, Siding, Windows/Doors, HES audit | Website | (860) 296-4867 | |
| Kenneth Warner & Sons Inc. | Branford | CT | Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | (203) 982-3481 | ||
| Kerigan Fuel Inc | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | ||
| Kevin Johnson Enterprises LLC | Durham | CT | Boilers/Furnaces, Central Air Conditioning | Website | 8603499299 | |
| KG Home Improvement LLC | Plainville | CT | Masonry | (860) 518-0236 | ||
| Khamp LLC | Broad Brook | CT | Electrical, Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | (860) 849-0766 | ||
| Kile Kooling, LLC | Meriden | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 537-0721 | ||
| King Energy LLC | Lebanon | CT | Geothermal, HES audit | Website | (860) 420-7134 | |
| Klebe Fuel Company, Inc. | Winsted | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 738-1114 | |
| Klockars Heating & Air Conditioning, LLC | Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | (203) 315-8995 | ||
| Kool Energy Technology LLC | Mount Vernon | NY | 347-789-0789 | |||
| Kozloski Plumbing & Heating | Stratford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 375-5010 | |
| Krall Heating and Cooling | New Haven | CT | Central Air Conditioning, Heat Pumps, Plumbing, Boilers, Furnaces | Website | (203) 466-1130 | |
| Krupa Oil Company, Inc. | Suffield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 745-2491 | |
| L & L Mechanical, LLC | Goshen | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 491-4007 | ||
| L.C. Mechanical LLC | East Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 593-1102 | ||
| L.H. Gault & Son Inc. | Westport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 227-5181 | |
| LA Plumbing & Heating LLC | Hartford | CT | Boilers/Furnaces, Plumbing | (860) 840-0532 | ||
| LA Roofing and Siding, LLC | Plantsville | CT | Roofing, Siding | Website | (860) 877-3006 | |
| LaFlamme Plumbing & Heating LLC | North Windham | CT | Boilers/Furnaces, Plumbing | Website | (860) 423-5385 | |
| Lafleur Builders | Danielson | CT | Roofing | Website | (860) 315-0769 | |
| Lagace Construction LLC | Andover | CT | 860-933-2700 | |||
| Lagassey Custom Homes, LLC | Plainville | CT | Electrical, Masonry, Roofing, Siding, Windows/Doors | (860) 637-6625 | ||
| Landlord Solutions LLC | Bristol | CT | Masonry | (860) 598-9868 | ||
| Landmark Air Systems Inc | Danbury | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 798-1199 | |
| Landsen Construction Corp. | Glastonbury | CT | Masonry | Website | (860) 633-6722 | |
| Landucci Heating & Cooling, Inc. | Torrington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 496-0114 | |
| Lantern Energy, LLC | Norwich | CT | Insulation, HES audit | Website | (877) 878-3006 | |
| Lassen Heating & Cooling LLC | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 951-5086 | |
| Lazer Management, LLC | Waterbury | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 483-6087 | ||
| LBS Hispanic Center LLC | Hartford | CT | Hazardous Material Abatement | (860) 982-1437 | ||
| Leahy's Fuels, Inc. | Danbury | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 748-3539 ext. 211 | |
| LeClaire Heating & Air, LLC | Seymour | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | (203) 922-1512 | ||
| Levco Tech Inc. | Trumbull | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 846-6500 | |
| Link Mechanical Services, Inc. | New Britain | CT | Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 826-5880 | |
| Linton Heating & Plumbing LLC | Stamford | CT | 2038200622 | |||
| Litchfield County Mechanical | Harwinton | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 601-2621 | |
| Litchfield Hills Solar, LLC | West Cornwall | CT | Solar | Website | (860) 868-6047 | |
| Lodge heating and Cooling LLC | Manchester | CT | 860-798-1452 | |||
| Long Hill Oil | Clinton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 664-3835 | |
| LT Construction LLC | Waterford | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 326-9322 | |
| M & M Heating & Cooling, LLC | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 377-5866 | ||
| M & R Mechanical Services LLC | Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 874-7914 | |
| M and M Mechanical, LLC | Wolcott | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 721-7477 | |
| M Robinson Mechanical | Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 922-7669 | ||
| M&M Oil, M&M Mechanical | Bolton | CT | 860-649-2871 | |||
| M. Picci Plumbing & Heating, LLC | Norwalk | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 727-7712 | ||
| M. Walenta Enterprises, LLC | Plainfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 564-4242 | ||
| M. Wilcox Heating, LLC | Naugatuck | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 723-0204 | ||
| M.A. Garamella Co., Inc. | Shelton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 925-9828 | |
| M.C. Electrical Contractors LLC | West Hartford | CT | Electrical | Website | (860) 883-8655 | |
| M.J. Emonds Mechanical Contractors LLC | Glastonbury | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Plumbing | Website | (860)-657-4554 | |
| M.J. Fahy & Sons, Inc. | Waterbury | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (203) 574-4808 | |
| M.J. Williams Heating & A/C Inc. | Woodstock | CT | 508-949-0035 | |||
| Macca Plumbing & Heating | Hartford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 560-1200 | |
| MacDonald + Co Plumbing LLC | Torrignton | CT | ||||
| Marandola Fuel Service, LLC | New Milford | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 355-4877 | |
| Marciano Building & Remodeling | North Haven | CT | Masonry | (203) 641-2851 | ||
| Mark H. Sekorski General Contracting LLC | Terryville | CT | Roofing, Siding, Windows/Doors | (860) 585-8331 | ||
| Marwin Mechanical Services Inc. | Essex | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 460-1164 | |
| Marzano Plumbing and Heating Co., Inc. | Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 296-9624 | |
| Massey Heating & Cooling, LLC | Monroe | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 650-1530 | ||
| Massimo Heating and Cooling, LLC | Oakville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (888) 316-2774 | |
| Master Mechanical, LLC | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 509-2152 | ||
| Master Roofing LLC | New London | CT | Roofing, Siding | (860) 908-3920 | ||
| Masters Heating and Air Conditioning, Inc. | Wallingford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 265-4434 | |
| Matt Melillo Comfort Services & Const. LLC | Brookfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Roofing | (203) 740-7295 | ||
| Matt The Plumber LLC | Haddam | CT | Plumbing | (860) 575-8097 | ||
| Maus & Son, Inc. | Moodus | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 873-8454 | |
| Maximum Home Performance, LLC | East Lyme | CT | Masonry | Website | (877) 827-9242 | |
| McCutcheon Building & Remodeling, LLC | Waterford | CT | Electrical, Insulation, Masonry, Plumbing, Roofing, Siding, Windows/Doors | Website | (860) 287-4422 | |
| MCR Refrigeration, LLC | dayville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 382-5977 | ||
| MDK Mechanical | N. Franklin | CT | 860-892-9710 | |||
| Mechanitech HVAC Solutions LLC | Bethlehem | CT | 203-592-1775 | |||
| Mercado Construction | Hartford | CT | Website | (860) 856-8866 | ||
| Michael Burruano Plumbing & Heating | Amston | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 639-1742 | ||
| Michael Tobin Plumbing, LLC | Sandy Hook | CT | Boilers/Furnaces, Heat Pumps, Plumbing | |||
| Mid River Heating and Cooling, LLC | Haddam | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 997-4486 | |
| Mid-State Mechanical Contractors | Middletown | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 635-3230 | |
| Middlesex Mechanical Services LLC | Portland | CT | ||||
| Midland Contracting Group | Bridgeport | CT | Masonry | (203) 336-0179 | ||
| Miele Mechanical Services LLC | New Britain | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 539-9234 | ||
| Mike's Plumbing Services LLC | Fairfield | CT | 203-223-8286 | |||
| Millas Heating & Cooling LLC | Mystic | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | (860) 415-9962 | |
| Millennials Roofing, LLC | Bridgeport | CT | Roofing, Siding | Website | (203) 928-8748 | |
| Miller Fuel, LLC | Burlington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 675-6121 | |
| Miller Plumbing & Heating | West Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 523-9966 | |
| Millstream Construction LLC | East Hartford | CT | Roofing, Siding, Windows/Doors | Website | (860) 288-5805 | |
| Minutemen Plumbing & Heating | Colebrook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 806-7070 | |
| Mitchell Fuel Co., Inc. | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 644-2561 | |
| MJB Plumbing and Heating LLC | Norwalk | CT | Boilers/Furnaces, Plumbing | (203) 505-4073 | ||
| MLJ Heating & Cooling, LLC | Tolland | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 281-5236 | ||
| Mobilio and Son HVAC, LLC | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 404-0471 | |
| Modern Comfort Mechanical | Enfield | CT | Boilers/Furnaces | Website | 8606922733 | |
| Modern Heating & Air Conditioning LLC | Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 283-0593 | |
| Modern Home Solutions CT LLC | Norwich | CT | 8608644314 | |||
| Momentum Solar | South Plainfield | NJ | Masonry, Roofing, Solar, Windows/Doors | Website | (732) 902-6224 ext 1353 | |
| Monarch Home Improvement, LLC | Shelton | CT | Masonry, Roofing, Siding, Solar, Windows/Doors | Website | (203) 308-0678 | |
| Monroe Mechanical LLC | Monroe | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 395-3922 | ||
| Montanari Fuel Service, Inc. | Ridgefield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 438-2688 | |
| MR Heating & Cooling LLC | Harwington | CT | 860-459-1908 | |||
| Mr. G's Heating & Cooling | Norwich | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (800) 303-0344 | ||
| Mr. Handyman of Upper Fairfield County | Fairfield | CT | Insulation, HES audit | Website | (866) 550-1710 | |
| MS Design and Construction LLC | Shelton | CT | ||||
| MTL Heating & Cooling | West Haven | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 619-1267 | |
| Mull Bros., Inc. | Wethersfield | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 529-8255 | |
| Mull Mechanical LLC | Rocky Hill | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 500-3096 | ||
| Munro Plumbing and Heating, Inc. | Madison | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 245-3369 | ||
| Murphy Bros Heating & A/C | Beacon Falls | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 729-0020 | |
| Musco Propane, LLC | Wolcott | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 879-8803 | |
| National Air Quality Services | Wallingford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 387-1709 | |
| Nazca Home Improvement LLC | Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Masonry, Roofing | (860) 214-7799 | ||
| Nealon Energy Solutions, LLC | Clinton | CT | Insulation | Website | (860) 669-0333 | |
| Neil Jones Home Improvements, LLC | Durham | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 424-2105 | ||
| Nero A/C, Heating & Refrigeration, Inc. | North Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (203) 248-8110 | |
| Neupmann Fine Carpentry, LLC | Danbury | CT | Insulation, Masonry, Plumbing, Roofing, Siding | Website | (203) 770-2071 | |
| New England Building Products | Meriden | CT | Insulation, Roofing | Website | (203) 235-7981 | |
| New England Conservation Services, LLC | Wallingford | CT | Insulation, Windows/Doors | Website | (877) 389-7077 | |
| New England Green Homes LLC | Stafford | CT | Insulation, Windows/Doors | (860) 930-7794 | ||
| New England Heating and Air Conditioning, LLC | North Branford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (203) 488-7904 | |
| New England Performance Insulation, LLC | Milford | CT | Insulation | Website | (203) 783-0748 | |
| New England Roofing & Home Repair LLC | Orange | CT | Masonry, Roofing | Website | (203) 795-3747 | |
| New England Smart Energy Group, LLC | Fairfield | CT | HES audit | Website | (203) 292-8088 | |
| New England Total Energy | Greenwich | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (800) 260-5954 | |
| New Generation Heating & Cooling LLC | Hartford | CT | 860-597-4524 | |||
| Newgate Oil Company Inc. | West Hartford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 953-9999 | |
| Newington Electric Co. | Newington | CT | Electrical | Website | (860) 667-1948 | |
| NJF Electrical Services, LLC | East Haven | CT | Electrical | Website | (203) 468-0356 | |
| Non-Stop Heating & Cooling, LLC | North Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 410-9360 | ||
| Norbert E. Mitchell Co., Inc. | Danbury | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Solar | Website | (203)744-0600 | |
| North Atlantic Contracting Corp. | Norwalk | CT | Masonry | Website | (203) 969-6781 | |
| Northern Comfort Mechanical, LLC | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 456-5163 | |
| Northern Improvement Company | Torrington | CT | Masonry | (860) 307-0965 | ||
| Northwest Plumbing and Mechanical | Canaan | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Plumbing | Website | ||
| Nova Construction, LLC | Bristol | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 883-6559 | |
| Noyan General Contractors LLC | Hartford | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 913-7817 | ||
| NTA, LLC | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | (203) 948 0560 | ||
| Nunes Quality Plumbing | Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 688-8709 | |
| Nutmeg Mechanical Services, Inc. | Manchester | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (860) 643-2042 | |
| Nutmeg Plumbing & Heating, LLC | East Hampton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (203) 751-2841 | |
| Off Grid Mechanical LLC | Oakville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | (860) 806-5542 | ||
| Olivares Improvement Contractor LLC | Bridgeport | CT | 203-449-8827 | |||
| Omni Mechanical Services, LLC | South Windsor | CT | Central Air Conditioning, Heat Pumps | (860) 256-5249 | ||
| One Hour Heating & Air Conditioning - Shelton | Shelton | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | 203-567-4888 | |
| One Hour Heating & Air Conditioning - Terryville | Terryville | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 589-8979 | |
| One Way Plumbing and Heating, Inc. | East Haddam | CT | Boilers/Furnaces, Plumbing | 8608732363 | ||
| Onofreo Home Comfort Systems, LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 301-4151 | |
| Onze Southern CT Plumbing & Heating, LLC | Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 876-7875 | |
| Ortiz Refrigeration, AC & Heating | New Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 799-6283 | |
| OSA Heating & Cooling, LLC | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 338-0371 | |
| Osterman Propane - Palmer | Palmer, MA | MA | Boilers/Furnaces | Website | (800) 332-3353 | |
| Pack-Timco, Inc. | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 847-8781 | |
| Paragon Heating and Cooling LLC | New Milford | CT | Central Air Conditioning, Heat Pumps, Boilers, Furnaces | Website | 475-296-4750 | |
| Parkway Oil Co. Inc. | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (203) 367-0083 | |
| Parsimony Air LLC | Wolcott | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 233-6501 | |
| Patton Home Improvement | Wallingford | CT | Masonry, Plumbing, Roofing, Siding, Windows/Doors | (203) 627-8991 | ||
| Paul Burdick Oil Co, LLC | Old Saybrook | CT | Boilers/Furnaces | Website | (860) 388-1130 | |
| Pawcatuck Roofing Company, Inc. | Pawcatuck | CT | Roofing | Website | (860) 599-1024 | |
| PDQ Plumbing & Heating, LLC | Fairfield | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 374-7388 | |
| Pelletier Mechanical Services, LLC | Thomaston | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 283-0316 | |
| Pennywise Oil Company, Inc. | Westbrook | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 399-8244 | |
| Peoples Products, Inc. | Newington | CT | Roofing, Siding, Windows/Doors | Website | (800) 354-7660 | |
| Perfect View Installation LLC | Berlin | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 883-6281 | ||
| Peter Kupchick Heating & Cooling, Inc | Fairfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, HES audit | Website | (203) 259-9787 | |
| Peter L. Brown Co. | Granby | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (860) 653-3350 | |
| Petey's Plumbing LLC | North Haven | CT | Plumbing | Website | (203) 745-5390 | |
| Petro Home Services - North Haven | North Haven | CT | Boilers/Furnaces, Central Air Conditioning | Website | (888) 735-5651 | |
| PG & Son Heating and Air Conditioning, Inc. | Southbury | CT | Boilers/Furnaces, Central Air Conditioning | (203) 267-1369 | ||
| Phase 2 Services, Inc. | Glastonbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 430-1337 | |
| Phoenician Home Improvement | Berlin | CT | Roofing, Siding, Windows/Doors | Website | (860) 748-0541 | |
| Phoenix Cleaning & Restoration | Wallingford | CT | Hazardous Material Abatement | Website | ||
| PHS Mechanical LLC | Shelton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 395-2188 | ||
| Plumb Perfection LLC | Trumbull | CT | 203-536-8265 | |||
| Plumbing Creations, LLC | Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 604-2589 | |
| Plumbing Doctor, LLC | Bridgeport | CT | Boilers/Furnaces, Plumbing | (718) 669-8890 | ||
| Plymouth Oil Service, Inc. | Plymouth | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 283-6651 | |
| Polytemp, Inc. | Port Chester | NY | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps | Website | (203) 531-6060 | |
| Porticade Construction LLC | Utah | NV | Solar PV System | Website | 3854980550 | |
| PosiGen Solar Solutions | Bridgeport | CT | Solar, HES audit | Website | (504) 293-4819 | |
| Positive Plumbing & Heating | Easton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 223-0409 | ||
| Potential Energy LLC | Bristol | CT | HES audit | Website | (844) 564-7283 | |
| Potters Oil Service, Inc. | North Windham | CT | Boilers/Furnaces, Heat Pumps | Website | (860) 423-1684 | |
| Power Home Remodeling Group, LLC | Chester | PA | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (888) 736-6335 | |
| Power Point Energy, LLC | Wethersfield | CT | Geothermal, HES audit | (860) 436-3511 | ||
| Precision Mechanical LLC | Manchester | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 878-7927 | |
| Preferred Air Systems, Inc | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Hazardous Material Abatement, Heat Pumps, HES audit | Website | (203) 778-6286 Ext. 10 | |
| Premium Siding & Windows, LLC | Naugatuck | CT | Roofing, Siding, Windows/Doors | Website | (203) 735-5450 | |
| Prestige Air, Inc. | New Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 350-1600 | |
| Pro Fox Contractors, LLC | Waterbury | CT | Masonry | (860) 589-7727 | ||
| Pro Source, LLC | Farmington | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (860) 305-7220 | |
| Pro-American Construction Company, LLC | Beacon Falls | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (203) 525-6690 | |
| Pronto Plumbing & Heating, Inc. | Bethel | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 223-4044 | ||
| Protech Heating and Conditioning, LLC | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 610-2391 | ||
| ProTech Heating, Inc | Orange | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 799-9228 | ||
| PSC Mechanical | Bristol | CT | Boilers/Furnaces, Central Air Conditioning | (860) 479-0543 | ||
| Q's Plumbing and Heating, LLC | Uncasville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 501-6006 | |
| Quality Home Improvement | East Hartford | CT | Masonry | (860) 983-9639 | ||
| Quality Home Systems Heating / AC, LLC | Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 827-9682 | ||
| Quality Insulation of Eastern CT Inc. | Taftville | CT | Insulation, Masonry, Windows/Doors | Website | (860) 886-2638 | |
| Quality Mechanical Corporation | East Haven | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 467-6712 | |
| Quality Propane, Inc. | Clinton | CT | Boilers/Furnaces | Website | (860) 669-4277 | |
| Quiet Corners Mechanical Services LLC | North Windham | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (860) 423-8560 | |
| Quinn Plumbing and Heating, LLC | Hamden | CT | Boilers/Furnaces, Electrical, Heat Pumps, Plumbing | Website | (203) 230-2227 | |
| R & B Refrigeration, Air Conditioning & Heating | Guilford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 453-6831 | |
| R & E Heating and Air Conditioning, LLC | Terryville | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (860) 970-9050 | |
| R & J Home Improvement LLC | Wethersfield | CT | Masonry | (203) 535-2304 | ||
| R & M Insulation, LLC | Winsted | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Insulation | (860) 738-2144 | ||
| R & R Heating and Cooling - Bridgeport | Bridgeport | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (203) 371-0200 | |
| R & R Plumbing & Heating, Inc. - Manchester | Manchester | CT | Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 649-6574 | |
| R&R Plumbing - Meriden | Meriden | CT | 203-530-2436 | |||
| R&W Heating, LLC | Salem | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 846-9993 | |
| R. L. Construction | New Britian | CT | Masonry, Roofing, Siding, Windows/Doors | (860) 978-5600 | ||
| R.J. Powers Co. Plumbing & Heating | Norwalk | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 847-2661 | ||
| R.T. Capobianco Plumbing & Heating, Inc. | Hartford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 522-9898 | ||
| Rafa's Restoration, LLC | Norwalk | CT | Masonry, Roofing, Siding | (203) 854-9180 | ||
| Ralph Mann & Sons, Inc. | Ansonia | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (800) 995-6266 | |
| Rapid Plumbing Service, Inc. | West Haven | CT | Air/Duct Sealing, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (203) 934-8628 | |
| Raps Plumbing & Heating, Inc. | Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 876-1212 | |
| Raven Remodeling Renovations | Bloomfield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Masonry, Plumbing, Roofing, Siding, Tree Removal, Windows/Doors, HES audit | Website | (960) 997-5096 | |
| Ray Page Plumbing, Inc. | Vernon | CT | Plumbing | Website | (860) 926-4842 | |
| Ray's Heating and Cooling LLC | Bridgeport | CT | Central Air Conditioning, Heat Pumps, Boilers, Furnaces | Website | 203-545-4614 | |
| RCL Plumbing LLC | Watertown | CT | 203-528-1537 | |||
| RDR Air LLC | Stratford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 521-1489 | |
| Reed Mechanical Solutions LLC | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning | Website | (860) 637-7641 | |
| Regal Mechanical & Home Improvement Inc. | South Richmond Hill | NY | 929-603-4770 | |||
| Reliable Heating Air Conditioning Co. | Killingworth | CT | 860-663-6000 | |||
| Reliable Mechanical Contractors | Windsor | CT | Boilers/Furnaces, Heat Pumps | (860) 752-4218 | ||
| Renewable Energy CT | Branford | CT | Solar | Website | (855) 875-7441 | |
| Renewal by Andersen of Southern New England | Lincoln, RI | RI | Windows/Doors | Website | (401) 228-9800 | |
| Renshaw Plumbing & Heating | New London | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860)3194476 | |
| Renz Heating and Air Conditioning LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, HES audit | (203) 877-2224 | ||
| RER Associates, LLC | Willington | CT | Hazardous Material Abatement, Masonry | (860) 234-0860 | ||
| Reutter Mechanical, LLC | Ellington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (860) 707-2002 | |
| RGS Energy | Denver | CO | Electrical, Solar | Website | (860)823-0031 | |
| Rich & John's Chimney | Woodbury | CT | Heat Pumps, Masonry | Website | ||
| Rich Carlson Heating & Cooling, LLC | Torrington | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (860) 601-2735 | |
| Rich Donegan Home Craftsman, LLC | Morris | CT | Insulation, Masonry, Roofing, Siding | Website | (860) 459-0968 | |
| Rich's Heating, LLC | Waterford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 443-4328 | |
| Rich's Plumbing, Heating and Air Conditioning | Enfield | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 763-2015 | |
| Rick's Main Roofing LTD | Norwalk | CT | Roofing, Windows/Doors | Website | (203) 838-5858 | |
| Rick's Plumbing Service, Inc. | Milford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 516-4542 | |
| Ridgefield Overhead Doors, LLC | Ridgefield | CT | Windows/Doors | Website | (203) 431-3667 | |
| Riki HVAC LLC | West Haven | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 893-2339 | ||
| Riley Plumbing & Heating Co., Inc. | Kensington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 225-1534 | |
| Riley's Heating Service | Baltic | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 822-9217 | ||
| Rings End, Inc. | Darien | CT | Masonry, Windows/Doors | Website | (203) 656-7553 | |
| Rite Temp Heating & Cooling, LLC. | Southington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 877-3550 | ||
| River Valley Oil Service, Inc. | Middletown | CT | Boilers/Furnaces | Website | (860) 342-5670 | |
| RLD Heating & Cooling, Inc. | Killingworth | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | Website | (860) 663-3181 | |
| Roberge Plumbing Inc (Roberge Plumbing & HVAC) | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860)747-1511 | ||
| Rocky's Home Improvements | West Redding | CT | Insulation, Masonry, Siding, Windows/Doors | (203) 792-4273 | ||
| Roger Crampton LLC | Old Lyme | CT | Boilers/Furnaces, Plumbing | Website | 8604342200 | |
| Roman Oil Co., Inc. | Meriden | CT | Boilers/Furnaces, Heat Pumps | Website | (203) 235-3371 | |
| Romano Plumbing, Heating and Construction | Rocky Hill | CT | Boilers/Furnaces, Electrical, Insulation, Plumbing, Roofing | (860) 794-1228 | ||
| Rookwood Cooling & Heating LLC | Windsor | CT | ||||
| Rooterman Hartford LLC | Newington | CT | Central Air Conditioning, Heat Pumps | (860) 663-1799 | ||
| Rose Plumbing & Heating | Hamden | CT | Heat Pumps, Boilers, Furnaces, Replacement Central Air Conditioning | 203-996-2129 | ||
| Ross Mechanical Contractors, LLC | New Britain | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 356-4324 | |
| Rousseau Plumbing & Heating, LLC | North Haven | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 288-9090 | |
| Rural Fuels | Trumbull | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 261-3541 | |
| Rutkowski Plumbing & Heating Co. | New Britain | CT | Boilers/Furnaces, Masonry, Plumbing | Website | (860) 223-8569 | |
| Ryan F. Murphy Heating & Cooling, LLC | New Milford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 994-4953 | |
| Ryan Oil Company Inc. | Hamden | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 248-6984 | |
| S.D.R. Plumbing & Heating, Inc. | Stamford | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Plumbing | Website | (203) 348-2295 | |
| S.G. Racette Plumbing, LLC | Springfield | MA | Boilers/Furnaces, Heat Pumps | (413) 786-6764 | ||
| Safeside Home Services, Inc | Hartford | CT | Air/Duct Sealing, Masonry | Website | (860) 296-2320 | |
| Santa Energy | Bridgeport | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 362-3332 x1318 | |
| Saucier Mechanical Services Inc. | Plantsville | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 628-9999 | |
| Sav-Mor Cooling & Heating, Inc. | Southington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 621-9959 | |
| SAVATREE, LLC | Bedford Hills | NY | Tree Removal | (914) 241-4999 | ||
| SB Plumbing and Heating, LLC | Orange | CT | Boilers/Furnaces, Electrical, Heat Pumps, Insulation, Masonry | (203) 507-9108 | ||
| Schede Plumbing & Heating | Stamford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 969-2299 | |
| Schmidt Plumbing & Heating Co. Inc. | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 757-6524 | ||
| Scoville Plumbing and Heating, Inc. | Torrington | CT | Boilers/Furnaces, Plumbing | Website | (860) 489-5010 | |
| Sea Side Restoration | East Haddam | CT | Masonry, Roofing, Siding, Solar, Windows/Doors | Website | (860) 853-0493 | |
| Sean's Heating and cooling LLC | Stratford | CT | 203-605-0178 | |||
| Sears Home Improvement Products Inc. | Longwood, FL | FL | Boilers/Furnaces, Central Air Conditioning, Roofing, Siding, Windows/Doors | Website | (407) 551-6000 | |
| Secondino Mechanical Services, LLC | North Branford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 907-9610 | ||
| Select Mechanical Services Inc. | Southington | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 681-6818 | |
| Sensible Home Products, LLC | Glastonbury | CT | Insulation, Roofing, Siding, Windows/Doors | Website | (860) 748-8772 | |
| Servco Oil, Inc. | Bridgeport | CT | Heat Pumps | Website | (203) 762-7994 | |
| Service Stars, Inc. | Danbury | CT | Central Air Conditioning, Heat Pumps, Plumbing | Website | (203) 763-4044 | |
| Servpro of Bloomfield / Enfield | Bloomfield | CT | Hazardous Material Abatement | Website | (860) 216-2785 | |
| Seymour Energy Services LLC | Seymour | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (203) 888-1700 | |
| Shaffer Beacon Mechanical Service, LLC | Granby | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 844-0111 | |
| Sharp Mechanical | Meriden | CT | Air/Duct Sealing, Central Air Conditioning | (203) 537-1097 | ||
| Shelton Insulation and Gutters LLC | Shelton | CT | 203-868-7960 | |||
| Shelton Oil and Heating | Shelton | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (203) 538-7145 | |
| Shetucket Plumbing & Heating, LLC | Norwich | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | (860) 625-4071 | ||
| Shine Construction | North Uxbridge | MA | Masonry, Roofing, Siding, Windows/Doors | Website | (508) 278–3300 | |
| Shoreline Spray Foam LLC | New Haven | CT | Insulation | Website | (203) 467-3626 | |
| Sila Heating & Air Conditioning Inc. | White Plains | NY | Boilers/Furnaces, Central Air Conditioning | Website | (914) 966-0800 | |
| Silberman Heating and Cooling LLC | Wallingford | CT | N/A | |||
| Silk Plumbing & Heating, Inc. | Norwalk | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (203) 838-0157 | |
| Silver City Furnace Co. Inc. | Meriden | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 237-0995 | |
| Silverio Mechanical, LLC | Essex | CT | Boilers/Furnaces, Central Air Conditioning, Geothermal, Plumbing | Website | (860) 581-8396 | |
| Silvermine Building Company | Norwalk | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Insulation, Roofing, Siding | Website | (203) 561-9240 | |
| Sima Drilling Company, Inc. | Cheshire | CT | Geothermal, Heat Pumps, Tree Removal | Website | (203) 272-3077 | |
| Sippin Energy Products | Monroe | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 261-3668 | |
| Sky Property Services, LLC | Ansonia | CT | Insulation, Roofing, Siding, Windows/Doors | Website | (203) 736-9648 | |
| Skye Mechanical Services LLC | Wolcott | CT | Central Air Conditioning, Heat Pumps, Plumbing, Boilers, Furnaces | 203-808-3630 | ||
| SLS Heating, LLC | Waterford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 447-8709 | |
| SM Mechanical Services LLC | Glastonbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 368-1572 | |
| Smart Roofs Solar Inc. | Trumbull | CT | Roofing, Solar | Website | (203) 209-2057 | |
| Smart Thermal Solutions, LLC | Pawcatuck | CT | Boilers/Furnaces, Central Air Conditioning, Plumbing | Website | (860) 373-8040 | |
| SMR Heating and Cooling, LLC | Middletown | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 729-9616 | ||
| Soderquist Plumbing & Heating LLC | Sandy Hook | CT | Boilers/Furnaces, Plumbing | (203) 426-6097 | ||
| SolarCity Corporation | San Mateo, CA | CA | Solar | Website | (650) 681-500 | |
| Solvit Home Services | Plainville | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Insulation, Plumbing, HES audit | Website | (860) 747-2000 | |
| Somers Oil Service Inc. | Somers | CT | 860-749-4490 | |||
| Son Energy Systems LLC | Lyme | CT | Solar | Website | (860) 434-2757 | |
| SOS Restoration & Construction | Woodbridge | CT | 2032156902 | |||
| Source Construction Services, LLC | New Milford | CT | Masonry | Website | (860) 488-0587 | |
| South Shore Heating and Cooling Inc. | Pawcatuck | CT | 860-599-5370 | |||
| Southport Contracting, Inc. | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Masonry, Plumbing | (203) 334-2323 | ||
| Spear Contractors, Inc. | Glastonbury | CT | Masonry | (860) 659-5818 | ||
| Spicer Advanced Gas | Groton | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 445-2436 | |
| Spotless Chimney Sweeping & Solutions, LLC | Newington | CT | Masonry | Website | (860) 414-5876 | |
| Spray Tech Insulation, LLC | Berlin | CT | Insulation | Website | (860) 621-3000 | |
| Spring Brook Ice & Fuel Service | New Britain | CT | Boilers/Furnaces | Website | (860) 225-6491 | |
| Spring Climate, LLC | Stamford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 388-8378 | |
| Stafford Mechanical Services, Inc. | Stafford Springs | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, HES audit | Website | (860) 684-9485 | |
| Stanco Energy LLC | Cheshire | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 272-4822 | ||
| Standard Oil of CT, Inc. | Bridgeport | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (800) 822-3835 | |
| Stanley Home Improvement, LLC | Newington | CT | Masonry | (860) 995-5991 | ||
| Starco of New Britain, Inc. | New Britain | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 223-5071 | |
| Staron Plumbing & Heating Co. | Higganum | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 950-4186 | ||
| State Line Propane/Oil | Granby | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 653-8076 | |
| Stephen Ouellette Siding & Roofing | Newington | CT | Masonry, Siding | (860) 667-2161 | ||
| Steve Basso Plumbing Heating & A/C, LLC | Bridgeport | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps, Plumbing | Website | (203) 335-0224 | |
| Stratus Mechanical Services LLC | Naugatuck | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | 203-687-2872 | |
| Strawbuilder LLC | New Hartford | CT | Masonry | Website | (860) 605-7784 | |
| Strong Roofing, LLC | Norwich | CT | Masonry, Roofing | (860) 367-1902 | ||
| Stu Grant Windows | Broad Brook | CT | Windows/Doors | Website | (860) 916-9494 | |
| Sturdy Home Improvement, Inc. | Indian Orchard | MA | Masonry, Roofing, Siding, Windows/Doors | Website | (413) 543-5906 | |
| Suburban Oil Co., LLC | Northford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | 2034849897 | ||
| Suburban Remodelers | Lebanon | CT | Roofing, Siding, Windows/Doors | (860) 573-6085 | ||
| Summer Hill Solar LLC | Woodstock | CT | Solar | Website | (860) 867-7027 | |
| Sunlight Solar Energy Inc. | New Haven | CT | Solar | Website | (203) 878-9123 | |
| Sunrise Plumbing, LLC | New London | CT | Plumbing | (860) 861-2860 | ||
| Superior Comfort Heating & AC LLC | Ansonia | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203)736-6309 | |
| Superior Energy, LLC | Vernon | CT | Boilers/Furnaces | Website | (860) 875-6221 | |
| Superior Home Performance, LLC | Manchester | CT | Insulation | Website | (860) 956-6469 | |
| Superior HVAC & Tank Removal | Waterbury | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 755-7400 x211 | |
| Superior Insulation & Services, LLC/CT Retrofit | Groton | CT | Insulation, Windows/Doors | Website | (860) 238-3113 | |
| Superior Plus Energy Services, Inc. | Rochester | NY | ||||
| Superior Remodelers LLC | Newtown | CT | Insulation, Roofing, Siding, Windows/Doors | Website | (888) 330-8148 | |
| Supreme Projects LLC | Fairfield | CT | Masonry, Roofing, Siding, Windows/Doors | (203) 556-2964 | ||
| Synergy Smart Homes LLC | Colchester | CT | 860-222-0958 | |||
| Systematic Mechanical Contractors, LLC | Orange | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 887-6818 | ||
| T & S Heating & Air Conditioning LLC | Portland | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 342-1506 | |
| T. Mednick Services, LLC | Milford | CT | Heat Pumps, Plumbing | (203) 815-5485 | ||
| T.A.P. Plumbing and Heating, LLC | Bristol | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 302-7117 | |
| T.P. Heating and Cooling LLC | Southington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 305-7867 | ||
| Tasse Fuel Corporation | Southbridge | MA | 508-765-0841 | |||
| Taylor Energy | Broad Brook | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 623-3308 | |
| TC Plumbing & Heating, LLC | Bloomfield | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (860) 250-7359 | ||
| TecKnow Smart Living Ecosystems | Westport | CT | Solar | Website | (203) 832-5669 | |
| Ted's Plumbing & Heating, Inc | West Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 569-0501 | ||
| Temp Check Services, LLC | West Haven | CT | Geothermal, Masonry, HES audit | Website | (203) 606-3572 | |
| Terrys Energy LLC | Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | (860) 828-3099 | ||
| The Boiler King Plumbing Heating & AC Inc. | Webster | MA | 508-425-1409 | |||
| The Energy Monster CT | Somers | CT | Air/Duct Sealing, Insulation, HES audit | Website | (860) 967-0924 | |
| The Energy Store, LLC | Newton | CT | Air/Duct Sealing, Insulation, Windows/Doors, HES audit | Website | (860) 480-9294 | |
| The Field of Plumbing & Heating, LLC | Plainville | CT | Boilers/Furnaces, Heat Pumps | (860) 793-2864 | ||
| The Furnace Man | Wallingford | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | (203) 678-4171 | ||
| The HDL Co. LLC | Lisbon | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 334-2970 | ||
| The Heat People, Inc. | Uncasville | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 848-4121 | |
| The Joseph Dess Co LLC | Bristol | CT | (860) 584-8160 | |||
| The Roofing Store LLC | Plainfield | CT | Roofing, Siding, Windows/Doors | Website | (860) 564-8300 | |
| The Shaffer Company, Inc. | Bristol | CT | Boilers/Furnaces, Plumbing | Website | (860) 583-1363 | |
| The Siding Guys, LLC | Plainville | CT | Masonry, Siding | Website | (860) 479-5971 | |
| The Siding Store, Inc | Plainfield | CT | Roofing, Siding, Windows/Doors | Website | (888) 867-1954 | |
| THERMALFIT, LLC | New London | CT | Roofing, Siding, Windows/Doors | Website | (860) 444-7663 | |
| Thermo Care LLC | Stamford | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 595-9321 | |
| Thomas R. Sottile, Inc. | Stamford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 223-6630 | ||
| Thomaston Comfort Control, Inc. | Thomaston | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 283-9939 | |
| Titan Enterprises Inc. | Ansonia | CT | 203-278-9030 | |||
| TJ Murphy Plumbing & Heating LLC | Milford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 877-6565 | ||
| TL Home Improvement LLC | Shelton | CT | Insulation, Siding | Website | (203) 870-5582 | |
| TLC Home Remodeling | Monroe | CT | Roofing, Siding | (203) 445-1943 | ||
| TNT Heating & Cooling LLC | Colchester | CT | 8603343667 | |||
| TNT Heating & Cooling LLC | Colchester | CT | 860-334-3667 | |||
| Toigo HVAC, LLC | Oxford | CT | Boilers/Furnaces, Central Air Conditioning | Website | (203) 828-6389 | |
| Tom Kelliher Home Improvement | Chicopee | MA | Masonry, Roofing, Siding, Windows/Doors | (413) 575-8428 | ||
| Tomax Heating & Cooling | Orange | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 298-0756 | |
| Tomified Floors & Remodeling | Waterbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Insulation, Plumbing, Windows/Doors | 2038052434 | ||
| Tony's Plumbing, Heating & Fire Protection | Groton | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Plumbing | |||
| Toolan Construction | Old Saybrooke | CT | Masonry, Roofing | (860) 391-1339 | ||
| Top Tier Fuel LLC | Windsor Locks | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860)5 02-5944 | |
| Torrington Sash & Door Works, Inc. | Torrington | CT | Windows/Doors | Website | (860) 482-5594 | |
| Total Comfort Control, LLC | Guilford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 484-9698 | |
| Total Comfort, Inc. | Danbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 791-2141 | |
| Total Mechanical Systems, LLC | Plainville | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 314-1518 | |
| Total Plumbing & Heating, Inc | East Haven | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (203) 481-8111 | ||
| Total Refrigeration | West Suffield | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 668-1459 | ||
| Toth Mechanical LLC | Shelton | CT | 203-993-0606 | |||
| Tower Energy, LLC | Plainville | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 793-1239 | |
| Town Oil Company, Inc. | Wethersfield | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 529-6813 | |
| Tracey Energy Services, LLC | New Haven | CT | Central Air Conditioning, Heat Pumps | Website | (203) 777-5747 | |
| Trade Services, LLC | Berlin | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 778-9142 | ||
| TradeTwins LLC | Watertown | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Geothermal, Heat Pumps, Plumbing | Website | (203) 558-6939 | |
| Traditional Innovations, LLC | East Hampton | CT | Masonry, Siding, Windows/Doors | (860) 267-6611 | ||
| Tri Tech Mechanical, LLC | Stamford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 359-3399 | |
| Tri-City Heating and Cooling LLC | Milford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Insulation, HES audit | Website | (203) 303-5700 | |
| Tri-Town Mechanical, LLC | Jewett City | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 376-4277 | ||
| Trident Mechanical Services | Farmington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | 860-716-0334 | ||
| Trovarelli Plumbing & Heating, LLC | Stratford | CT | Boilers/Furnaces, Heat Pumps, Plumbing | (203) 209-7780 | ||
| TruVue LLC | Trumbull | CT | 203-650-3601 | |||
| TSS Construction, LLC | Canterbury | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (860) 548-6617 | |
| Tuscany Design Build | South Windsor | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Geothermal, Heat Pumps, Plumbing | Website | (860) 881-1025 | |
| Twin Mechanical, LLC | Madison | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | (203) 687-1442 | ||
| Tyler Heating, Air Cond. & Refrigeration LLC | Stratford | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Insulation, Plumbing | Website | (203) 378-4700 | |
| U.S. Remodeling Group, LLC | Milford | CT | Masonry, Roofing, Siding, Windows/Doors | (203) 877-7471 | ||
| Ugo DiGrazia Air Conditioning & Heating, Inc. | Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 296-1281 | |
| Ultimate Construction LLC | West Hartford | CT | Masonry | Website | (860) 229-2476 | |
| Under Construction Contractors, LLC | North Haven | CT | Website | (203) 239-3600 | ||
| United Mechanical Resources Inc | Meriden | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (203) 752-6252 | |
| United Roofing & Exteriors, LLC | Sandy Hook | CT | Masonry, Plumbing, Roofing, Windows/Doors | |||
| Uplands Construction Group, LLC | North Stonington | CT | Insulation, Windows/Doors | (860) 535-8118 | ||
| US Insulation Corp. | West Hartford | CT | Insulation, HES audit | Website | (860) 829-8881 | |
| Valley Air Conditioning and Heating, Inc. | Simsbury | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 658-0371 | |
| Valley Fireplace & Stove LLC | Canton | CT | Masonry, Windows/Doors | Website | (860) 693-3404 | |
| Valley Oil | Portland | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | 866-297-8038 | |
| Valleyview Windows | Naugatuck | CT | Siding, Windows/Doors | Website | (860) 833-9942 | |
| Ventrella Mechanicals | Trumbull | CT | Air/Duct Sealing, Central Air Conditioning, Heat Pumps | (203) 246-6577 | ||
| Victory Heating and Cooling, LLC | Meriden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps, HES audit | (203) 715-0553 | ||
| Viglione Heating & Cooling Inc. | East Haven | CT | Boilers/Furnaces, Central Air Conditioning, Electrical, Heat Pumps | Website | (203) 467-8388 | |
| Vik's Exteriors, LLC | Orange | CT | Masonry, Roofing, Siding, Windows/Doors | Website | (203) 393-8811 | |
| Viking Fuel Oil Co., Inc. | West Hartford | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 233-6225 | |
| Villwell Builders I LLC | Waterbury | CT | Hazardous Material Abatement | Website | (888) 256-3780 | |
| Vintage Restorers, LLC | Killingworth | CT | Masonry, Windows/Doors | (860) 227-0728 | ||
| Violette Mechanical | Vernon | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 870-9276 | |
| Violette Restorations, LLC | Wethersfield | CT | Roofing, Siding, Windows/Doors | (860) 257-3706 | ||
| W.J. Crosby Plumbing & Heating | New Britain | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 223-6111 | |
| W.L. Heating & Cooling, LLC | Windsor Locks | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 627-8000 | |
| Waldo Renewable Electric, LLC | Old Lyme | CT | Solar | Website | (203) 494-9523 | |
| Walsh Heating & Cooling | Monroe | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (203) 445-3373 | ||
| Watkins Mechanical, LLC | East Hartford | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 716-9593 | ||
| Weathertite Systems LLC | Naugatuck | CT | Insulation, Roofing, Siding, Windows/Doors | Website | (203) 758-4227 | |
| West Hartford Windows, LLC | West Hartford | CT | Insulation, Roofing, Siding | Website | (860) 410-6107 | |
| West Side Oil Company | West Suffield | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | Website | (860) 668-4322 | |
| West State Mechanical, Inc. | Torrington | CT | Boilers/Furnaces, Central Air Conditioning, Heat Pumps, Plumbing | (860) 482-5919 | ||
| Whittley Electric, LLC | New Haven | CT | Electrical | (203) 494-4454 | ||
| Wilcox Energy, Inc. | Westbrook | CT | Central Air Conditioning, Heat Pumps | Website | (860) 399-6218 | |
| Williams and Associates Mechanical Contracting Inc. | North Stonington | CT | Boilers/Furnaces, Heat Pumps, Plumbing | Website | (860) 867-6976 | |
| Williams Plumbing & Heating Inc | Bridgeport | CT | Boilers/Furnaces, Plumbing | (203) 414-3177 | ||
| Window World of Connecticut | Manchester | CT | Siding, Windows/Doors | Website | (860) 643-4568 | |
| Windowland, LLC | Newtown | CT | Siding, Windows/Doors | Website | (203) 270-9829 | |
| Windsor Locks Oil | Windsor Locks | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 623-1214 | |
| Wiser Home Remodeling | New Canaan | CT | Insulation, Masonry, Roofing, Siding, Windows/Doors | Website | (203) 594-7814 | |
| Wittig Mechanical, LLC | Ellington | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | (860) 573-6188 | ||
| Woodstock Building Associates LLC | Woodstock | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Masonry, Plumbing, Solar | Website | (860) 928-0897 | |
| Wyman Energy Services, Inc. | Manchester | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps | Website | (860) 643-2453 | |
| Yankee Home Improvement, Inc. | Northampton | MA | Insulation, Roofing, Siding, Windows/Doors | (413) 341-5259 | ||
| Yankee Oil, Inc. | Mansfield | CT | Boilers/Furnaces, Central Air Conditioning | Website | (860) 423-9111 | |
| Yankee Remodeler | New London | CT | Siding, Windows/Doors | Website | (860) 443-6646 | |
| Yargueta Construction, LLC | Newington | CT | Roofing, Siding, Windows/Doors | Website | (860) 758-8308 | |
| Year-Round Mechanical, LLC | Meriden | CT | Air/Duct Sealing, Boilers/Furnaces, Central Air Conditioning, Heat Pumps |