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Best heating and air conditioning pros near Mercerville, NJ

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TRUSTED BY MERCERVILLE, NJ HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon220
    Verified heating and air conditioning services reviews

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

Avatar for Climate Mechanics LLC
Climate Mechanics LLC
4.9(
53
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+47 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"We found CLIMATE MECHANICS from their stellar reviews while searching for a knowledgeable and competent HVAC company. For years, we were dealing with a condensation problem with our LG mini split air conditioner, and no one could find the source of the problem. We can honestly say that we've never experienced a company like CLIMATE MECHANICS so committed to making things right. Nate, the awesome climate mechanic that came to our home, and Robert, the owner of the company, could understandably have walked away because they did not install the system and were not responsible for the problem. Nate worked for hours trying to locate the problem. In the end, after so many years of leaking, CLIMATE MECHANICS went above and beyond and resolved our ongoing problem. Toni, their wonderful contact person, told us repeatedly that Robert just wanted us to be happy in the end. And we are. Totally. Thank you Robert, Nate and Toni."
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+4

Response time1 day
12 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for LIV AIR
LIV AIR
5.0(
14
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+22 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Staff is very friendly and helpful and well-trained professionals. They serviced my appliances and solved my issues on the same day whereas other service companies would not. Liv Air is the best HVAC service provider and I highly recommend their services."
Heating & A/C Project
Heating and Air Conditioning Project
Heating and Air Conditioning Project
Heating & A/C Project
Heating & A/C Project

+46

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for Whitestone Heating and Cooling
Whitestone Heating and Cooling
4.9(
30
)
Gas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+35 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Excellent! The units were installed accurately and correctly! My house has been very cool and comfortable. The Whitestone staff was courteous and professional. The work was reasonably priced and I am a very satisfied customer! Job Well Done!! Special thanks to the owner Mr. West. If you are looking for an HVAC repair or replacement, I strongly recommend Whitestone! Hire them, you will be glad you did!!"
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+14

Response time5 hrs
3 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for No 1 Cleaners
No 1 Cleaners
4.8(
295
)
Air Ducts & Vents - Clean

Serving Mercerville, NJ and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"No 1 Cleaners were very professional and did a good job of cleaning our air conditioning ducts and vents. Carlos was knowledgable and did a through job. However, there was one thing that we did not like. While angi said that the initial quotation was FREE, No Cleaners said that if they came to provide a quote and we decide not to proceed with the work, we needed to pay $99 as fee for inspection. This was a bit disturbing as others did not charge for the visit and initial quote. I would recommend No 1 Cleaners as they were were professional and executed very well."
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+13

Response time9 hrs
Response rate100%
16 neighbors recently requested a quote
Avatar for American Air Duct Cleaning & Services
American Air Duct Cleaning & Services
5.0(
61
)
Air Ducts & Vents - Clean

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Brian from American Air Duct was friendly and did a super thorough job. Absolutely will use them again when I need any of the services they perform. Great job!!"
Dryer vent cleaning
Duct cleaning
Dryer vent cleaning
Duct cleaning
Duct cleaning

+15

Response time4 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Horizon Services, Inc. (NJ)
Horizon Services, Inc. (NJ)
3.9(
1,637
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallDuctless Mini-split A/C - Install or Replace+12 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 1989

Emergency services offered

Warranties offered

"Hired Horizon Services for HVAC replacement and plumbing (replace copper pipes that were old and deteriorating with pex and replace 40-year-old tub and surround). Both had a professional here quickly to give me an estimate and then again to start the work. The HVAC work was done quickly but large debris was left and communication with the installation crew was not good. The plumbing work is still underway but communication is good."
Horizon Services Heating & Cooling
Horizon Services Heating & Cooling
Horizon Services Heating & Cooling
 Horizon Services Heating Installations
 Horizon Services Heating Installation

+19

19 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for AAC Heating and Cooling, LLC
AAC Heating and Cooling, LLC
4.5(
65
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+10 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Adam and Nate installed my new HVAC system in my home. This is my second time dealing with Adam since 2013. Adam is very honest and professional. My family is very satisfied with our new AC system. I would definitely recommend these guys for all of your heating and cooling needs."
HVAC
LENNOX: Heating and Air Conditioning
Carrier HVAC
LENNOX: Heating and Air Conditioning-Ductless
Lennox AC

+4

Response time1 day
Recommended by98%of homeowners
Avatar for Advanced Aardvark Air Duct and Carpet Cleaning Co.
Advanced Aardvark Air Duct and Carpet Cleaning Co.
4.7(
29
)
Air Ducts & Vents - Clean

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"Had an amazing experience! This was the second time using this company and again I was not disappointed!! The guys showed up on time, were very professional. Explained what they were going to do. Since I had just bought a new house and the vents were so dirty they said they would like to use a disinfectant. It’s very nice to have piece of mind knowing that my air and dryer vents are nice and clean! I would definitely recommend them."
6 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Whiteston Heating & Cooling, LLC
Whiteston Heating & Cooling, LLC
4.6(
36
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairElectric Furnace / Forced Air Heating System - Repair+1 more

Serving Mercerville, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"Excellent professional service company. This was an emergency replacement of our 2nd floor unit during a heat wave that meant Whitestone had to work in our attic in extreme heat conditions! They did a fantastic job and made sure we were up and running as soon as possible."
Quality control check
gas bolier
Oil steam boiler
90% Trane heating and cooling
Trane central heating &cooling

+1

Response time9 hrs
16 neighbors recently requested a quote
Recommended by81%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

Both evaporator coils and condenser coils are recyclable and contain valuable, sellable metals such as copper and aluminum. Not only is it more earth-friendly to take them to a local metal recycling facility, but you can also trade them in for cash. Also, once the coils are removed from the system, they won’t have any traces of refrigerant, so you won’t have to arrange for recycling Freon or R-410A unless you’re disposing of the entire AC system.

Condensation forms when warmer, outside air combines with cooler air in your ductwork. This can happen when there are leaks in your air ducts, your HVAC system has a dirty air filter, or there’s a lack of insulation around the ducts. To prevent it from happening, replace your HVAC filters as directed. Also, once every five years, hire a local air duct cleaner to clean and inspect them.

Yes, technicians check refrigerant levels, loop performance, and system calibration for peak efficiency.

No. Evaporator coils are designed to work with specific refrigerant types, and they are rated by what kinds of refrigerant they use. It’s indicated with an “R” code. It’s important to match your evaporator coil and refrigerant or your system will not work properly. An AC technician can tell you what type of refrigerant your system needs and what evaporator coils will work with it.

ACs don't run on water. They're not connected to drain pipes or any part of your plumbing system. However, they need refrigerant to run. Refrigerant is a gas or liquid that has a low boiling point and absorbs the heat in your home. ACs need this in order to be functional and cool your home. If you suspect your AC is low on refrigerant, you need to contact a licensed HVAC professional. Refrigerant is a dangerous chemical that requires specialized training and permits to work with. 

The Mercerville, NJ 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.