Five awards, each decided by the record: 4,233 Google reviews read, state licenses checked with Michigan LARA, and the same formula for all 28 companies. Only companies with an active state license are eligible. Nobody can buy one. Based on data as of October 27, 2026.
Highest Referrally Score
Holly · ranked #1 of 28
See Adkisson Air 1 Heating and Cooling Autumn Glo Fireplaces on the list · Award badge
Most reviews that say they'd recommend
Flint · ranked #8 of 28
See SGI Heating, Cooling, and Electrical on the list · Award badge
Best reply rate and speed
Grand Blanc · ranked #2 of 28
See DION'S COMPLETE Plumbing, Heating & Cooling on the list · Award badge
Most new reviews in 12 months
Holly · ranked #1 of 28
See Adkisson Air 1 Heating and Cooling Autumn Glo Fireplaces on the list · Award badge
Longest-held state license
Flint · ranked #11 of 28
See Terry Allen Plumbing & Heating on the list · Award badge
How winners are chosen: HVAC companie of the Year is the highest Referrally Score. Most Recommended counts reviews that say they'd recommend the company. Most Responsive uses reply rate and speed. Fastest Growing counts new reviews in the last 12 months. Longest Standing uses the state license issue date. Companies need at least 15 reviews for the last four. Read how we rank.