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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon1k+
    Verified heating and air conditioning services reviews

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

Avatar for Comfort Louisville HVAC
Comfort Louisville HVAC
4.5(
114
)
Central A/C - InstallCentral A/C - Service or RepairGas Furnace / Forced Air Heating System - Install+5 more

Serving Northfield, KY and surrounding areas

Approved (Corporate)

In business since 2001

Free estimates

Emergency services offered

"My a/c hadn't worked for two days, it was 90 degrees in the house. our go to hvac company is comfort heating and air, we called them, and a gentlemen named Taylor Burton showed up and promptly got to work. He was able to fix the issue within 10 minutes. He told us what was wrong, and even changed the filter to the unit. I highly recommend this company. I've used them before for my hvac needs, and both times they were able to fix whatever problem I had. 5/5 stars."
Comfort Tech
Technicians
HVAC
HVAC Tech
HVAC Tech

+1

152 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for One Choice Mechanical
One Choice Mechanical
4.7(
127
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+47 more

Serving Northfield, KY and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"Extremely professional and thorough. I was delighted with the service. Two other HVAC companies had tried and failed to fix the problem I was having. Lucas quickly identified the problem and solved it with minimal cost. I would very highly recommend this company. NOTE -- cost of service represents only my out of pocket cost through my home warranty service.
"
Lucas Parker -Owner
Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for Aire Serv of Louisville
Aire Serv of Louisville
4.7(
559
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+44 more

Serving Northfield, KY and surrounding areas

Approved

Super Service Award Winner

In business since 1977

Free estimates

Emergency services offered

"We had recently purchased a home and had reason to be believe it had been some time since the HVAC was serviced.  Aire Serv came out and performed a cleaning and inspection of the system.  The technician was punctual and polite.  He did a good job and fixed a minor leak we had in the condensation line. 



They offered some recommendations for improvements, but did not try to upsell us on anything.



We will be using Aire Serv again.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+14

41 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Comfort Zone Heating & Air
Comfort Zone Heating & Air
4.6(
19
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallDucts & Vents - Install or Replace+47 more

Serving Northfield, KY and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"This is a great company and I am glad they are around. Extremely professional, detail oriented, hard working and honest. I needed to replace my ancient HVAC system and I was fortunate to have had this company help me with that. I ended up with a couple of bids for the same brand and model and Comfort Zone gave me an honest price which was thousands less than a competitor (Again, same brand and model number). Equally important is that they know what they are doing and they do the job right unlike many of the less knowledgeable competitors. Honest, knowledgable, hard working, great to deal with! They have earned my business for sure."
Electrical Project
Additional Photos
Additional Photos
Additional Photos
Response time7 hrs
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Greenwell Plumbing Heating & Air
Greenwell Plumbing Heating & Air
4.4(
107
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+47 more

Serving Northfield, KY and surrounding areas

Approved (Corporate)

In business since 1994

Free estimates

Emergency services offered

"The office people were nice very and responsive. I needed installation in a hurry and they scheduled me promptly. The technician wasn't too friendly but he did the job. I had to ask alot of questions because he wasn't forthcoming with any information. Other than that I would definitely use them again. Since I am a member of The REMC, I didn't have to pay Greenwell anything, It was all done through my electric company.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

16 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Red White and Cool Heating and Air
Red White and Cool Heating and Air
5.0(
12
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallDucts & Vents - Install or Replace+12 more

Serving Northfield, KY and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"We used a big box company to install our HVAC stuff and they ruined the unit and never told us. For years we paid hundreds in the summer and winter to get it fixed, it would only break again. I finally called Bailey at Ref white and cool and he came out found the “real” problem. He educated us on everything and answered all our questions. He gave us several Options, but in the end we bought a new system which he installed. It’s been a few years and we haven’t had any problems. It was a wonderful experience with him and his wife! We will ONLY use them from now on!"
Ductless mini splits
Ductless mini splits
Ductless mini splits
Heatpump system
Heatpump system

+6

7 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

A new air conditioner capacitor will cost less than replacing the entire air conditioner system. While a capacitor itself will cost between $8 and $25, paying a professional to replace an AC capacitor will cost $180 on average. It’s not safe to replace an air conditioner capacitor on your own. 

Yes, running your air conditioning unit too cold can cause condensation in the air ducts and built up moisture on the air filter, resulting in a breeding ground for mold and mildew. Mold and mildew growth can irritate those with respiratory issues, so it’s best to keep your AC running at a normal temperature.

No, not all HVAC systems have a fresh air intake, but there are many advantages to having one. For example, a fresh air intake can boost the air quality inside your home and help your furnace run more effectively. Plus, it can make your house more energy efficient, possibly saving you money on your utility costs.

Here’s how AC professionals will clean your AC coils:

  1. Unplug the AC unit or turn off the breaker to the unit in your circuit breaker box.

  2. Remove the faceplate.

  3. Spray a vacuum hose attachment or compressed air can to remove debris, dust, dirt, and grime.

  4. Use a soft-bristled fin comb to remove stubborn caked-on debris.

  5. Use the vacuum hose to suck up any extra debris.

  6. Take a coil-safe cleaning solution and spray it onto the coils. Try to choose a no-rinse solution.

  7. Let the solution sit for at least 15 minutes.

  8. Gently wipe away loosened grime and debris with a microfiber cloth.

  9. Reattach the faceplate, plug in your AC system, or turn the breaker back on.

No, it's not advisable to only replace the outside AC unit connected to your system. AC units are designed to work as a cohesive system, and older units work differently than newer units. Therefore, replacing only one component can lead to incompatibilities that affect the system’s performance. Replacing one component can void your warranty, costing you money for repairs.

The Northfield, KY 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.