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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon70
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Saint Clair - Updated Nov 2026

Avatar for Doctor Ducts, LLC
Doctor Ducts, LLC
5.0(
75
)
Air Ducts & Vents - Clean

Serving Saint Clair, MI and surrounding areas

Approved

In business since 2010

Free estimates

Small jobs welcome

"Clean Air Ducts and Vents - Doctor Ducts was great to work with. Excellent customer service and very detailed in explaining what was being done with my furnace and air ducts. They took pictures of what my vents looked like before/after. I would recommend them and will use their services again."
Response time2 hrs
Response rate98%
1 neighbors recently requested a quote
Avatar for EMH Mechanical LLC
EMH Mechanical LLC
5.0(
8
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install - For Business+7 more

Serving Saint Clair, MI and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"EMH Mechanical is my Only HVAC company, I have used there services for over 6 years now, compared to the past companies I have used, No other Company compares, From my Primary Home, to My rental properties and my Automotive Repair Shop Commercial Building and one other Commercial property I own, on time Always, projects finished on time as stated, no disappointments whatsoever, do not sleep on this company, they are the best in the business from residential, commercial and industrial, best prices also, Thank you Ethan to you and your staff, I can never say how much you guys are appreciated."
Shop HVAC Upgrade
Shop HVAC Upgrade
Office HVAC Upgrade
Florida Room HVAC
Master Bedroom HVAC

+9

Response time1 day
8 neighbors recently requested a quote
Efficient heating and cooling
5.0(
2
)
Geothermal Heating or Cooling System - Service

Serving Saint Clair, MI and surrounding areas

Approved

13 years experience, we install furnaces, a/c systems and ductless systems. 10 yr warranties on all equipment. We also offer a/c tune ups which consist of cleaning outdoor condenser and all checking refrigerant charge on your system. We also offer a complimentary air filter change with this service. Don't wait until its hot to make sure your system will operate properly.

Upper bedroom
Clean
Finished
Cassette
Cracked heat exchager

+3

A & C Heating & Cooling, LLC
3.5(
2
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - Repair

Serving Saint Clair, MI and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"We were very impressed with A & C Heating and Cooling. Their online scheduling tool was convenient, user friendly, and there was a variety of time slots available. The appointment follow up, reminders and arrival tracking map were timely and helpful. Our technician, McKinley, was amazing!!! He was very courteous, knowledgeable and efficient. He diagnosed the problem quickly, installed the needed part, and ran tests to ensure the unit was running at peak performance. He educated us about our unit by explaining how it operates, what caused the problem, and how the replacement part would remedy the problem. We are VERY satisfied with their service. We give this company and our technician our highest rating, and we would highly recommend them to anyone in need of quality heating and cooling installation or service. ."
Response time3 hrs
Response rate100%
Recommended by100%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

If the air coming from your AC unit is cool but never quite cold, there are a few reasons this might be happening. For starters, it could signal that your refrigerant levels are low. If there are no other indications of this particular issue, like hissing noises or frozen refrigerant lines, anything from dirty filters to damaged condenser or evaporator coils could be responsible for the problem.

Whether an HVAC damper should be open or closed depends on the season, the zone it controls, and the temperature in that zone. In the summer, open upstairs dampers and close lower-level dampers to get the most efficient cooling possible. In the winter, do the opposite. Cool air will naturally flow down to lower levels, while warm air will rise. This keeps your system from working harder and helps prevent common AC problems.

Yes, but they don’t feel the same as an AC-cooled room. You’ll feel cool, moist air, opposite from an HVAC system that dries the air as it cools. Ventless units also have less tonnage than alternatives like ductless and central air, which means they aren’t as capable of quickly cooling large spaces or circulating cold air.

While "dry" mode on your AC can help reduce humidity levels to some extent, it may not be as effective as a dedicated dehumidifier, especially in areas with extremely high humidity or larger spaces. Dehumidifiers are specifically designed to remove moisture from the air more efficiently, making them a better choice for tackling persistent humidity issues.

A dirty air conditioning coil can cause your unit to work overtime, leading to reduced efficiency, higher energy use, more wear and tear, and possible ice buildup. If the coils corrode, refrigerant can leak, causing damage, possible mold growth, and an expensive repair bill. By cleaning your AC coils once a year, you’ll have a more efficient unit that’s likely to last longer.

The Saint Clair, MI homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.