You’ll be comfortable with us!

We're a locally-owned family business dedicated to providing expert heating and air conditioning solutions to our customers for 50 years and counting.

proverbs 22:1
"a good name is more disirable than great riches; to be esteemed is better than silver or gold."
AC Repair Service Reston VA | Dave's Heating and Air Conditioning

Dave’s is the #1 Choice for AC and Heating Repair or Replacement in Fairfax and Loudon counties

We’ve proudly served the Reston and Sterling area since 1975. This means we've spent over 49 years keeping you comfortable!

When you’re looking for heating, air conditioning, and water heater service in Fairfax and Loudon counties, you can count on us.

Our HVAC techs are highly skilled and experienced professionals who treat your home like their own. Our technicians have over 100 years of combined experience! We devote a lot of time to ensuring every team member represents our Core Values. “You’ll be comfortable with us”, that is our guarantee to you.

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Dave’s today for expert service – 571.346.3940

Major Types of HVAC Equipment in Reston
There's more than one way to heat and cool a home. Below is a quick break down of the equipment you might see in Virginia:

What Is It: This unit cools your home by removing heat and humidity from the indoor air. Known as a central air conditioning system, it operates with an outdoor unit and an indoor coil.

How Do I Know I Have One: Air conditioners use ductwork to distribute cool air throughout the home. Theoutdoor unit is usually found outside the house, while the indoor coil is placed in the duct system near the furnace.

Life Span (Years): 10-15

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What Is It: It's large, in-charge, and responsible for heating your home. Typically referred to as a central heating system, this piece is set apart from boilers by its lack of a tank.

How Do I Know I Have One: These units rely on ductwork to move warm air around. They're typically located in the center of the home.

Life Span (Years): 15-20

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What Is It: When it comes to flexibility, it's hard to beat a heat pump. Able to alternate between heating and cooling, these units merge the functionality of an AC unit and furnace. They're also ultra-efficient. These units can be ducted or ductless.

How Do I Know I Have One: You flip your thermostat to HEAT and the exterior unit turns on. You had to add an air handler.

Life Span (Years): 10-15

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What Is It: In homes in Reston with central HVAC, the furnace's blower motor is responsible for air distribution. For people with heat pumps or just air conditioners, an air handler is installed to take its place.

How Do I Know I Have One: You don't have central heating but still have a large box in your home. It typically has a slot for your air filter.

Life Span (Years): 15-25

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What Is It: Though sometimes able to alternate between heating and cooling, not all mini-splits are heat pumps. They're a go-to choice for people who want to add air conditioning to a ductless home. They're also an ideal option for additions and garages.

How Do I Know I Have One: These units feature wall mounted units called cassettes. You also lack ductwork.

Life Span (Years): 20-25

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For prompt AC service in Reston or Herndon, you can't go wrong with us. Trust us to handle your cooling repair or replacement.

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Don't end up stuck in the cold! Trust us the next time you need furnace or boiler repair in Herndon or Reston.

Fix Your Heating System



Our indoor air quality services in Fairfax and Loudon counties help you and your family breathe easier. Contact us for a quote on humidifier installation or an air quality analysis.

Get Cleaner Air



When it comes to fixing and diagnosing water heaters in Reston, our technicians are the best. From installing a tankless system to small water heater repairs, you can rely on us.

Avoid Cold Showers
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We stand behind our Cooling company's work in Herndon VA.
  • Aldie
  • Annandale
  • Ashburn
  • Berryville
  • Brambleton
  • Burke
  • Centreville
  • Chantilly
  • Fairfax
  • Fairfax Station
  • Falls Church
  • Great Falls
  • Hamilton
  • Herndon
  • Leesburg
  • Lovettsville
  • Mclean
  • Merrifield
  • Potomac Falls
  • Purcellville
  • Reston
  • Round Hill
  • Sterling
  • Tysons
  • Vienna

“Why Choose Dave’s”

Trusted Advisors for Over 50 years!

Group of people in Reston after being advised on HVAC solutions

We have serviced all brands over the years and are uniquely qualified to help you with your Reston ac and heat pump repairs. Rest assured, whether the issue is heating or cooling, that we'll help you find the right solution to your problem.

Expert Residential Service and Installation

Group of happy office workers in Reston after getting AC repair from Dave's Heating and Air Conditioning

When you use us for ac or air conditioning replacement in Reston, you'll love how we do things. We focus foremost on your needs and selecting a system that meets your performance and pricing requirements. Call 571.346.3940 for a furnace or AC installation that fits your home like a glove.

Professional and Fair

Parent holding child's hand meant to represent morality of our Reston AC service company

Simply stated- we take care of our customers. Those core values of ours? They're not just empty promises. They're what we live and service by. We have been treating our customers in the Reston professionally and fairly for over 50 years. At Dave's Heating and Air Conditioning, that's what we do.

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