Sanilac County, Michigan
Top-Rated HVAC Companies in Sanilac County, MI (2026)
13 HVAC companies in Sanilac County. The top 25 by score, then every city.
Who is the best HVAC company in Sanilac County, MI?
As of October 2026, the highest-scoring HVAC company in Sanilac County on TownAnswer is Heat-Flow Mechanical in Brown City, with 63 out of 100.
Top 11 in Sanilac County
| # | Business | City | Score | Rating | Reviews |
|---|---|---|---|---|---|
| 1 | Heat-Flow Mechanical | Brown City | 63 | 4.8 | 25 |
| 2 | GeoMasters Heating and Cooling LLC | Croswell | 61 | 4.9 | 28 |
| 3 | Sears Appliance Repair | Sandusky | 59 | 4.4 | 33 |
| 4 | 5 Star Heating Cooling & Refrigeration, LLC | Croswell | 57 | 4.8 | 45 |
| 5 | Airsource Heating & Cooling | Marlette | 54 | 5.0 | 14 |
| 6 | Preferred Heating & Cooling | Melvin | 52 | 4.3 | 6 |
| 7 | Randazzo Heating & Cooling | Marlette | 49 | 4.5 | 4 |
| 8 | Same Day Plumbing & Heating | Croswell | 43 | 4.2 | 86 |
| 9 | Larry's Refrigeration LLC | Deckerville | 43 | 4.2 | 5 |
| 10 | Certified Temperature Innvtns | Carsonville | 33 | 1.7 | 6 |
| 11 | Precision Temp Heating and Cooling | Deckerville | 33 | 3.0 | 2 |
HVAC Companies by city in Sanilac County
| City | Listed | Scored | Top business |
|---|---|---|---|
| Croswell | 3 | 3 | GeoMasters Heating and Cooling LLC |
| Deckerville | 3 | 2 | Larry's Refrigeration LLC |
| Marlette | 2 | 2 | Airsource Heating & Cooling |
| Brown City | 1 | 1 | Heat-Flow Mechanical |
| Sandusky | 1 | 1 | Sears Appliance Repair |
| Melvin | 1 | 1 | Preferred Heating & Cooling |
| Carsonville | 1 | 1 | Certified Temperature Innvtns |
| Worth Township | 1 | 0 | n/a |
What to ask
- Does the company hold a Michigan mechanical contractor licence?
- Will they do a load calculation before they size a new system?
- Is the quote for the installed system, with removal and permit included?
- What is the parts and labor warranty, and who registers it?
- Do they offer a maintenance plan, and what does a tune-up include?
Questions
How many HVAC companies are in Sanilac County?
Our October 2026 data lists 13 HVAC companies in Sanilac County across 8 city pages.
Who is the top-rated HVAC company in Sanilac County?
As of October 2026, the highest-scoring HVAC company in Sanilac County on TownAnswer is Heat-Flow Mechanical in Brown City, with 63 out of 100.
Can a business pay to rank higher?
No. Every business is scored by the same rules.
TownAnswer ranks local businesses by one published method. Businesses cannot pay to change their rank. Ratings and review counts come from Google Maps, read in October 2026. Details change, so confirm hours, prices and licences with each business. How we rank.