| Custom Mechanical | | Frankfort | DE | | source |
| American Vintage Home | | Chicago | IL | | source |
| Deljo Heating & Cooling | | Chicago | IL | | source |
| Goode Plumbing | | Chicago | IL | | source |
| Blue Frost Heating & Cooling | | Geneva | IL | | source |
| Home Comfort | | Niles | IL | | source |
| Church Plumbing & Heating | | Elkhart | IN | | source |
| A+Derr Heating & Cooling | | Evansville | IN | | source |
| Masters Heating and Cooling | | Fort Wayne | IN | | source |
| Reliable Comfort Heating & Air | | Seymour | IN | | source |
| Climate Control Heating & Air Conditioning | | Lexington | KY | | source |
| Greenbox Heating & Air | | Lexington | KY | | source |
| Turbo Plumbing Pros | | Lexington | KY | | source |
| Indoor Comfort Heating & Cooling | | Ann Arbor | MI | | source |
| Mountaineer Plumbing | | Grand Rapids | MI | | source |
| Schaafsma Heating & Cooling | | Grand Rapids | MI | | source |
| Vredevoogd Heating & Cooling | | Grand Rapids | MI | | source |
| Hager Fox Heating & Cooling | | Lansing | MI | | source |
| Randazzo Heating & Cooling | | Macomb | MI | | source |
| Iceberg Heating & Cooling | | Monroe | MI | | source |
| Flame Heating, Cooling, Plumbing & Electrical | | Warren | MI | | source |
| Robin Aire Service Company | | Wixom | MI | | source |
| 4Front Energy | | St. Louis Park | MN | | source |
| Buckner’s Heating & Cooling | | Kansas City | MO | | source |
| R-Mech Heating, Cooling & Plumbing | | Kansas City | MO | | source |
| Classic Aire Care | | St. Louis | MO | | source |
| Faszold Comfort Systems | | St. Louis | MO | | source |
| Weis Heating & Cooling | | St. Louis | MO | | source |
| Lakes Heating and Air Conditioning | | Akron | OH | | source |
| Superior Drainage & Plumbing | | Akron | OH | | source |
| Kobella, Plumbing, Heating, & Cooling | | Chesterland | OH | | source |
| National Heating and Air Conditioning | | Cincinnati | OH | | source |
| Nelson Comfort | | Cincinnati | OH | | source |
| Verne & Ellsworth Hann | | Cleveland Heights | OH | | source |
| P.K. Wadsworth | | Solon | OH | | source |
| BluFlame Service Co. | | Toledo | OH | | source |
| Hurlburt Heating, AC, & Plumbing | | Eau Claire | WI | | source |
| The Thielmann Group | | New Berlin | WI | | source |
| Pat’s Heating & Air Conditioning | | Oconomowoc | WI | | source |
| Frasier’s Plumbing, Heating, & Cooling | | Rhinelander | WI | | source |
| Action Plumbing, Heating & Cooling | | Sun Prairie | WI | | source |