"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.
"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.
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proverbs 22:1
“a good name is more desirable than great riches; to be esteemed is better than silver or gold.”
Dave’s is the #1 Choice for AC and Heating Repair or Replacement in Loudoun County
When you’re looking for heating, air conditioning, and water heater service in Loudoun County, 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.
We’ve proudly served the Reston and Sterling area since 1975. This means we’ve spent over 49 years keeping you comfortable!
Call or Text 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. The outdoor unit is usually found outside the house, while the indoor coil is placed in the duct system near the furnace.

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.
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
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
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
AIR CONDITIONING
AIR CONDITIONING
Heating
Heating
AIR QUALITY
AIR QUALITY
WATER HEATERS
WATER HEATERS








“Why Choose Dave’s”
Trusted Advisors for Over 50 years!
We have serviced all brands over the years and are uniquely qualified to help you with your Reston furnace 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
When you use us for heat pump or heater 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
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.
Dave's Reviews
EXCELLENT Based on 108 reviews Steven Page2025-08-08Trustindex verifies that the original source of the review is Google. Great, fast service! Installed a new hot water heater and heat pump for us this year. Great experience working with a local company! Tiana2025-08-07Trustindex verifies that the original source of the review is Google. We've had a great experience with Dave's. The technician, Adam, is particularly fabulous. They are prompt, personable and give excellent service. Diana Clemente2025-08-07Trustindex verifies that the original source of the review is Google. Good service from Dave's. Todd was very helpful and responsive. Unfortunately part of it was installed incorrectly so there was some follow up needed but that was taken care of quickly also. Constance Washington2025-08-06Trustindex verifies that the original source of the review is Google. On 4 June 2025, Dave’s Residential Heating & Air Conditioning installed a Heat Pump Full System in my home. I wish rate the installation as five stars. The installation crew were courteous, efficient and professional. Regards, Constance W. Andi Lohr2025-08-06Trustindex verifies that the original source of the review is Google. I am a long time customer of Dave’s Heating & Air Conditioning. The service has always excellent and the technicians are friendly. I had a new heat pump installed in May and I am enjoying being nice and comfortable all summer long. Thank you for the excellent service over the years! You have wonderful staff❣️ Lois Sohn2025-08-06Trustindex verifies that the original source of the review is Google. It was a five-star experience from start to finish working with Todd and the installation technicians with Dave's Heating & Air Conditioning. They recommended the most suitable unit for us based on our needs and HOA requirements. We couldn't be happier with the unit they installed. The installation went smoothly, and the installers provided useful information for efficient operation and support needs down the road. Andrew Goldsmith2025-08-05Trustindex verifies that the original source of the review is Google. A truly outstanding company! From Javier the owner to Mike and Adam the technicians, they are total pros! This job involved installing an Ecobee thermostat and converting a communicating system into a legacy system. Everyone has been direct and pleasant. Adam was meticulous during the installation. When the system needed to be adjusted, Javier offered to send out Mike who tweaked a few things to make everything work perfectly. We would certainly use Dave’s again and will recommend them to our friends and relatives! Carlos Bradshaw2025-07-31Trustindex verifies that the original source of the review is Google. Javier and his team did a wonderful job. We lost our AC on a Saturday, they came same day,got us a quote and were able to install a new system within a few days. Would recommend to anyone looking for a reliable HVAC vendor. Rosemarie Iarrobino2025-07-28Trustindex verifies that the original source of the review is Google. I just want to take a moment to sincerely thank you for the consistently, wonderful service you’ve provided over the years. I have been with Dave’s since 1991, and I can honestly say it’s been a pleasure every step of the way. From the moment I called, Javier was Kind, responsive and professional. He made what could have been a stressful situation so much easier and I am grateful. Adam was not only very skilled as usual but friendly and respectful of my home. These qualities seem hard to come by these days. So many of your technicians have been wonderful through the years. Whether it’s a routine maintenance or an emergency visit to replace the water heater, I am Always confident knowing I can trust and depend on Dave’s Heating. Thank you all for your continued dedication to your customers. You’re the Best. Rosemarie Nicastro Iarrobino. Elissa Brooks2025-07-27Trustindex verifies that the original source of the review is Google. 10/10. Great customer service, very fast and a fair price. Could not recommend more!