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TRUSTED BY FAIRFAX, VA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon2.7k+
    Verified heating and air conditioning services reviews

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

Avatar for Relax HVAC, Inc.
Relax HVAC, Inc.
5.0(
32
)
Central A/C - Service or RepairBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+21 more

Serving Fairfax, VA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"My AC failed and I had limited time to find a good solution, I made a phone call to Relax HVAC based on the online reviews and it was a great decision. Nasser came to check the situation, he gave a very detailed and comprehensive overview of the situation and provided with the options I had. I decided to replace the unit, Nasser went above and beyond to find a unit delivery service but there was nothing available over the weekend so this gentleman went for unit pick up himself and finished the installation within a day from my initial call. Moreover, the provided price was very reasonable.I can't be more happy with the outcome and highly recommend Relax HVAC"
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+12

Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Magna Tech Temp Air, LLC
Magna Tech Temp Air, LLC
4.8(
167
)
Central A/C - Service or RepairHeat Pump - Repair or ServiceThermostat - Repair or Reprogram+4 more

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"So happy I worked with Magna for my issue! They came within 45 minutes of me posting on Angie's List... that has to be some kind of record. They diagnosed the issue quickly, clearly communicated what was needed and what the cost would be, and I moved forward with it. My AC was back up and running within an hour. Highly recommend! I've saved Magna Tech's phone number in my contacts and they will be the first company I call every time I have an HVAC issue."
New !6 Seer 3 Ton Air condition
B-Vent
New 80% Gas Furnace Instal
Ashburn Upgrade
Ashburn upgrade

+4

Response time3 hrs
13 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for OHA HVAC, Plumbing, Chimney & Fireplaces
OHA HVAC, Plumbing, Chimney & Fireplaces
4.9(
27
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+19 more

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 1995

Free estimates

Emergency services offered

"OHA is my go to HVAC company and especially Brendan. Brendan is fantastic. Brendan ia always professional and customer centric. He provides great service by describing what he is doing at the visit and follows it up with a thorough detailed analysis of what he did and found."
AC Maintenance / Tune-Up
AC Maintenance / Tune-Up
AC Maintenance / Tune-Up
AC Maintenance / Tune-Up
AC Maintenance / Tune-Up

+3

Response time1 day
Response rate100%
8 neighbors recently requested a quote
Avatar for Polar Bear Air Conditioning And Heating Inc
Polar Bear Air Conditioning And Heating Inc
4.4(
237
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Repair+47 more

Serving Fairfax, VA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"They installed a new boiler and central air conditioning in my DC rowhome and did a fantastic job. Joe answered all of my questions and they stayed on schedule with the project which was great because it was a larger project. I would highly recommend their services for the quality of workmanship and their prices were very reasonable as well. I will contact them again for future HVAC work in the DC area."
Response time1 day
9 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Winds of Valley LLC
Winds of Valley LLC
4.9(
145
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairHeat Pump - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"We had some issues with our HVAC. Asked for a quote based on what we thought the issue might be. The team at I-HVAC responded promptly, talked us down (aka explained we didnâ t need what we thought we did), and showed up same day. Prompt, courteous, professional."
I-HVAC
I-HVAC
I-HVAC
I-HVAC
I-HVAC

+5

Response time3 hrs
1 neighbors recently requested a quote
Recommended by99%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

There are several tell-tale signs that your AC coils need cleaning, including:

  • You’re getting higher electricity bills.

  • Your home doesn’t feel as cool as it usually does.

  • Your AC unit is running longer than usual to cool your home.

  • Your home is more humid than usual.

  • The coil is covered in frost while running.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

Ceiling fans can be a great way to cool your home without the expensive utility bill of running an air conditioner. Plus, ceiling fans can sometimes run in both directions, pushing hot air down in winter and pulling cold air up in summer. With that said, air conditioning might be the only thing that helps if you live in a very warm climate.

If you don't clean your AC evaporator coils, dirt and debris will build up, which impairs the system's ability to transfer heat. This forces the unit to work harder, leading to inefficient performance, higher energy bills, and frequent breakdowns. Over time, neglected coils can corrode, which may cause refrigerant leaks, or develop mold, ice buildup, and a clogged condensate drain, resulting in poor air quality and an uncomfortable home.

Split systems are the most common type of HVAC system. Split systems have two main units: an indoor one and an outdoor one. These units work together to pull in air, heat or cool it, and distribute it throughout your home. Other popular types of HVAC systems include hybrid systems and packaged heating and air systems.

The Fairfax, VA 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.