| 3 Keys To A Home LLC | HVA | 2014 | Active |
| A & B Propane Inc | HVA | 1991 | Active |
| Acms LLC | HVA | 2009 | Active |
| Acta LLC | HVA | 2022 | Active |
| Air Care Solutions LLC | HVA | 2010 | Active |
| Air Handlers Mechanical Services Inc | HVA | 1999 | Active |
| Aireclimate LLC | HVA | 2016 | Active |
| Applied Resource Technologies LLC | HVA | 2017 | Active |
| Arctic Breeze Heating & Cooling LLC | HVA | 2003 | Active |
| Associated Mechanical Companies Inc | HVA, REF | 2005 | Active |
| Atlantech Mechanical Services LLC | HVA | 2013 | Active |
| Atlantic Coast Heating And Cooling Inc | HVA | 2009 | Active |
| B Comfort Heating & AC LLC | HVA | 2019 | Active |
| Better Electric Inc | HVA | 2005 | Active |
| Blake Services Inc | HVA | 2009 | Active |
| Branning Contracting Solutions Inc | HVA | 2021 | Active |
| Bravo Services LLC | HVA | 2024 | Active |
| Bryant-Ritter Electric LLC | HVA | 2006 | Active |
| Bufford Mechanical LLC | HVA | 2025 | Active |
| Build America Construction Inc | HVA | 2012 | Active |
| Casmech Heating And Cooling And Refrigeration LLC | HVA | 2014 | Active |
| Chesapeake Heating & Air Conditioning LLC | HVA | 2012 | Active |
| Choice Builders Of Virginia Inc | HVA | 2011 | Active |
| Coastal Breeze Heating And Cooling LLC | HVA | 2022 | Active |
| Coastal Comfort Systems LLC | HVA | 2022 | Active |
| Comfort Systems Of Virginia Inc | HVA | 2006 | Active |
| Commercial Appliance Service Inc | HVA, REF | 2000 | Renew by Oct 31, 2026 |
| Community First Colonial Inc | HVA | 2003 | Active |
| Complete Combustion LLC | HVA | 2009 | Active |
| Conner Mechancial Inc | HVA | 1999 | Active |
| Conyers Electrical Services Incorporated | HVA | 2008 | Active |
| Cornerstone Gen. Contractors Plumbing Heating & Mech Inc | HVA | 2005 | Active |
| Country Air Heating & Cooling Inc | HVA | 2001 | Active |
| Cpcar Inc | HVA | 2007 | Active |
| Crossroads Fuel Service Inc | HVA | 1996 | Active |
| Cutting Edge Total Comfort Inc | HVA | 2007 | Active |
| D & R Mechanical Inc | HVA | 2008 | Active |
| D T Read Steel Co Inc | HVA | 1995 | Active |
| Design Plumbing & Mechanical Inc | HVA | 2006 | Active |
| Domestic Fuels & Lubes Inc | HVA | 1992 | Active |
| E & I Tech LLC | HVA | 2015 | Active |
| E. L. Sawyer Heating & Cooling Incorporated | HVA | 2012 | Active |
| East Coast Mechanical Inc | HVA | 2015 | Active |
| Edwards Heating & Cooling Inc | HVA | 1992 | Active |
| Efficient Air Heating And Cooling LLC | HVA | 2025 | Active |
| Elite Service & Enterprises LLC | HVA | 2014 | Active |
| Essential Contractors LLC | HVA | 2006 | Active |
| Expert Refrigeration Heating & Air LLC | HVA, REF | 2009 | Active |
| Freedom Electric Inc | HVA | 2006 | Active |
| G & G Service & Contracting Inc | HVA, REF | 1998 | Active |
| Get Lit Electrical LLC | HVA | 2019 | Active |
| Gregorys Heating & Cooling Inc | HVA | 2019 | Active |
| Guaranteed Climate & Refrigeration LLC | HVA | 2025 | Active |
| Hampton Roads Mechanical Of Virginia LLC | HVA | 2010 | Active |
| Hanbury Heating And Cooling LLC | HVA | 2026 | Active |
| Harrisons Plumbing | HVA | 2023 | Active |
| Haskells Heating & Cooling Inc | HVA | 2008 | Active |
| Heartland Construction Inc | HVA | 2013 | Active |
| Heating Air Conditioning Resolution LLC | HVA | 2022 | Active |
| Heller Enterprises Inc | HVA | 1996 | Active |
| His Service LLC | HVA | 2015 | Active |
| Hobbs Mechanical LLC | HVA | 2006 | Active |
| Home Repair Specialists LLC | HVA | 2020 | Active |
| Hotwire Electrical Services LLC | HVA | 2025 | Active |
| HVAC Designs Inc | HVA | 2005 | Active |
| Integrity Heating & Cooling Corp | HVA, REF | 2002 | Active |
| Integrity Plumbing And Cooling Inc | HVA | 2007 | Active |
| Intracoastal Mechanical LLC | HVA | 2023 | Active |
| It S Electric Inc | HVA | 2002 | Active |
| Ivan S Heating & Cooling Inc | HVA, REF | 2000 | Active |
| J & S Mechanical Inc | HVA | 2021 | Active |
| J&P Enterprize LLC | HVA | 2014 | Active |
| JMR Heating And Cooling Inc | HVA | 2012 | Active |
| Jr Home Services LLC | HVA | 2026 | Active |
| JRC Mechanical LLC | HVA | 2016 | Active |
| K & B Heating And AC LLC | HVA | 2018 | Active |
| K&A Mechanical Inc. | HVA | 2023 | Active |
| Keith S Professional Services Inc | HVA | 2008 | Renew by Nov 30, 2026 |
| Kooltek Services LLC | HVA | 2022 | Active |
| KPM Heating And Air Conditioning Incorporated | HVA | 2011 | Active |
| L G Merritt Inc | HVA | 2005 | Active |
| Lacey S Heating & Air Conditioning Inc | HVA | 2005 | Active |
| Mechanical Source Solutions LLC | HVA | 2020 | Active |
| Mechtech Services Inc | HVA | 2003 | Active |
| Mid Atlantic Petroleum Services Inc | HVA | 1997 | Active |
| Mid Atlantic Sheet Metal Contractors | HVA | 2025 | Active |
| Minton And Roberson Incorporated | HVA | 1995 | Active |
| MLB Pro Services LLC | HVA | 2025 | Active |
| On Time Heating & Air Conditioning Inc | HVA | 2022 | Active |
| On Time Plumbing Inc | HVA | 2009 | Active |
| Pairis And Sons Heating And Cooling LLC | HVA | 2018 | Active |
| Phoenix Heating & Cooling LLC | HVA | 2014 | Active |
| Piedmont Service Group LLC | HVA | 2012 | Active |
| Pioneer Industries LLC | HVA | 2018 | Active |
| Ple LLC | HVA | 2021 | Active |
| Prime Services LLC | HVA | 2013 | Active |
| Priority HVAC Mechanical LLC | HVA | 2021 | Active |
| Priority Mechanical LLC | HVA | 2025 | Active |
| Puffin Mechanical LLC | HVA | 2020 | Active |
| Quality Plumbing & Mechanical Inc | HVA | 2005 | Active |