| Rank | Company | Local Executive(s) | Employees | Founded |
|---|---|---|---|---|
| 1 | Baete-Forseth HVAC | Robert A. deWit, president | 120 | 1945 |
| 2 | Frisbee Plumbing, Heating, A/C & Electrical | Tom Hines, general manager | 120 | 1960 |
| 3 | Midwestern Mechanical Inc. | Dwayne Klarenbeek, president; Frank Howe, vice president | 110 | 1983 |
| 4 | Krier & Blain Heating & Air Conditioning | Mark Sechser, president | 85 | 1979 |
| 5 | Tessiers Inc. | Michael C. Wagner, P.E. division manager | 75 | 1919 |
| 6 | Hander Inc. Plumbing & Heating | Chuck Hander, owner | 65 | 0000 |
| 7 | Howe Heating & Plumbing Inc. | Ron Howe, president | 43 | 1940 |
| 8 | Clean Plumbing & Heating | Brad Busch, president, owner | 35 | 2002 |
| 9 | Breyfogle Plumbing & Heating | James Breyfogle, owner | 25 | 1970 |
| 10 | Central Heating & Air Inc. | Kevin Ibach, Jeff Haas, co-owners | 18 | 1997 |
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