| A |
| Advanced HVACnot edited since 2018 | 5450 Canotek Road, Blackburn Hamlet | | | |
| Air Zonenot edited since 2018 | 174 Colonnade Road South, Nepean | | | |
| AirOnenot edited since 2022 | 2283 Richardson Side Road, Stittsville | | | |
| Ambassador Dearie HVACnot edited since 2018 | 101 Innes Park Way, Gloucester | | | |
| Anchor Climate Carenot edited since 2019 | 1439 Youville Drive, Orléans | | | |
| Anchor Home Comfort | 1181 Parisien St., Gloucester | anchorhomecomfort.com | | |
| B |
| Best Energy Conservationnot edited since 2018 | 81 Auriga Drive, Nepean | | | |
| Boone Plumbing & Heating Supplynot edited since 2019 | 1806 Woodward Drive, Westboro | | | |
| Breezehill Heatingnot edited since 2019 | 75 Breezehill Avenue North, Hintonburg | | | |
| C |
| C.I.S. HVACnot edited since 2018 | 2596 Edinburgh Place, Gloucester | | | |
| C&S Heatingnot edited since 2018 | 19 Grenfell Crescent, Nepean | | | |
| Capital City Heating and Coolingnot edited since 2018 | 174 Colonnade Road South, Nepean | | | |
| Clement Marchandnot edited since 2018 | 1010 Polytek Street, Gloucester | | | |
| Climec Residential Incnot edited since 2018 | 2160 Thurston Drive, South Keys | | | |
| Cloud 9not edited since 2019 | 2615 Lancaster Road, Gloucester | | | |
| Colairnot edited since 2019 | 3473 McBean Street, Richmond | | | |
| Comfy Airnot edited since 2018 | 2285 St-Laurent Boulevard, Alta Vista | | | |
| Crowley Heating & Air Conditioningnot edited since 2018 | 22 Antares Drive, Nepean | | | |
| D |
| Delta HVAC & Suppliesnot edited since 2019 | 5 Caesar Avenue, Nepean | | | |
| Delta TAB Servicesnot edited since 2018 | 8 Sweetnam Drive, Stittsville | | | |
| Dilfo Mechanicalnot edited since 2019 | 1481 Cyrville Road, Gloucester | | | |
| E |
| E.N. Bluenot edited since 2019 | 148 Reis Road, Carp | | | |
| Equal Airnot edited since 2019 | 70 Bongard Avenue, Nepean | | | |
| Ercan's Heating & Coolingnot edited since 2019 | 2001 Robertson Road, Bells Corners | | | |
| F |
| Forest H.V.A.C.not edited since 2022 | 375 Des Épinettes Avenue, Orléans | foresthvac.com | | |
| Francis Home Environment Heating and Air Conditioning | 38 Antares Drive, Nepean | francishome.ca | | |
| Francis HVACnot edited since 2018 | 81 Auriga Drive, Nepean | | | |
| H |
| Harding Heating & Air Conditioningnot edited since 2022 | 2210 Cavanmore Road, Stittsville | | | |
| Holmes Heating | 1050 Baxter Road, Nepean | | | |
| Howard Boyle Heating & Air Conditioningnot edited since 2019 | 1726 Bank Street, Alta Vista | | | |
| HTSnot edited since 2018 | 830 Campbell Avenue, Westboro | | | |
| I |
| ICI HVACnot edited since 2018 | 15 Capella Court, Nepean | | | |
| J |
| JC Robinson & Sonsnot edited since 2020 | 1726 Bank Street, Alta Vista | | | |
| K |
| Kroon | 1420 Youville Drive, Blackburn Hamlet | | | |
| L |
| Lar-Mexnot edited since 2019 | 113 Walgreen Road, Stittsville | | | |
| Logic Mechanicalnot edited since 2019 | 5 Caesar Avenue, Nepean | | | |
| Longhill Energy Productsnot edited since 2022 | 124 Reis Road, Carp | longhill.ca | | |
| M |
| Maxima Technical Services | 1439 Youville Drive, Orléans | | | |
| MWA Heating & Coolingnot edited since 2018 | 50 Slack Road, Nepean | | | |
| O |
| Ottawa Air Designnot edited since 2019 | 65 Bentley Avenue, Nepean | | | |
| Ottawa HVAC | 3809 St. Joseph Boulevard, Orléans | ottawa-hvac.com | | |
| Ottawa Mechanical Contractingnot edited since 2018 | 5 Fairmont Avenue, Hintonburg | | | |
| P |
| Parent Heating & Coolingnot edited since 2018 | 5360 Canotek Road, Blackburn Hamlet | | | |
| Preston Phippsnot edited since 2018 | 1701 Woodward Drive, Westboro | | | |
| R |
| Reid Heating & Cooling | 36 Capital Drive, Nepean | reidheatingandcooling.ca | | |
| Right Touch Heating and Coolingnot edited since 2018 | 5370 Canotek Road, Blackburn Hamlet | | | |
| S |
| Shawn Contracting Inc | 1657 Cyrville Road, Gloucester | | | |
| T |
| The Energy Centre | 1181 Newmarket Street, Gloucester | | | |
| TL Mechanicalnot edited since 2019 | 1010 Polytek Street, Gloucester | | | |
| X |
| X-L-Air Energy Servicesnot edited since 2019 | 141 Wescar Lane, Stittsville | | | |