Heating & Cooling Services for Northern Virginia & Surrounding Areas

100% Satisfaction guarantee!

As the leading HVAC service provider in VA and throughout the United States, we proudly serve communities from coast to coast—bringing expert service and peace of mind to homes throughout your area. %{location_name} is based in Ashburn and provides expert heating and cooling services to residents in Northern Virginia and the surrounding areas.

Check out our complete service area map below. If you’re still unsure whether we service your address, give us a call at (571) 380-7548.

Two One Hour Heating & Air Conditioning technicians standing confidently in front of a service van.

Heating, AC & Furnace repairs in Northern Virginia

100% Satisfaction guarantee!

When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.

At One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time - guaranteed.

HVAC Near Me In...

One Hour Heating & Air Conditioning® of Northern Virginia services the following communities:

Paeonian Springs
Ashburn
Sterling
Leesburg
Lovettsville
Waterford
Marshall
Middleburg
Orlean
Paris
Philomont
Purcellville
Bluemont
Rectortown
Round Hill
Delaplane
Hamilton
Lincoln
Upperville
Warrenton
Winchester
Berryville
Boyce
Front Royal
Millwood
Stephens City
Stephenson
White Post
Aldie
Manassas
Centreville
Bristow
Broad Run
Catharpin
Ashburn
Chantilly
Gainesville
Haymarket
Warrenton
The Plains
Manassas
Catlett
Nokesville
Dumfries
Quantico
Triangle
Woodbridge
Ruby
Stafford
Fairfax Station
Lorton
Occoquan
Woodbridge
Manassas
Centreville
Clifton
Burke
Fairfax
Washington
Dulles
Chantilly
Sterling
Herndon
Reston
Fairfax
Oakton
Vienna
Herndon
Reston
Great Falls
Greenway
Mc Lean
West Mclean
Vienna
Annandale
Dunn Loring
Fairfax
Falls Church
Merrifield
Springfield
Arlington
Alexandria
Fort Belvoir
Mount Vernon
Springfield
Alexandria
Washington
Falls Church
Arlington
Fort Myer
Alexandria

We Have a Reputation

For Being Punctual, Friendly and Knowledgable

4.6

(533 reviews)

David Long

01-30-2025

“Great chatting with Michael!”

Mimi B

01-21-2025

“Our service was completed by Michael. Our thermostat failed on 1/16, days before our scheduled service date of 1/20 so, we decided to wait rather than request additional service. Michael arrived on time, professional, courteous and his knowledge, observable. We asked that he address the non functioning thermostat prior to beginning the regular maintenance, given the expected drop in temperature. Michael quickly diagnosed and addressed the issue. We have received services from this company for over 10 years BUT, this experience with Michael was definitely the best. Thank you.”

John Andrews

01-18-2025

“Routine maintenance was performed by Michael Terry. He came in the advertised time frame, He was respectful to put covers on his shoes to prevent tracking dirt into the house; he was extremely friendly and informative. He executed his job quickly but efficiently, and gave valuable advice for future care. I commend him for his performance and for his abilities.”

Beverly Ballinger

11-18-2024

“Scott did an excellent job on my HVAC today he solved lots of air issues I was extremely pleased with his professional expertise. Highly recommend Modern Mechanics”

Joel Itskowitz

10-29-2024

“Love having one provider for HVAC, Electrical & Plumbing”

Gayle Blair

10-29-2024

“Carlos did and excellent job of checking and maintaining our ac system. He is an excellent technician”

10-13-2024

“Great company. We have been using them for several years. They are honest, respectful, punctual, & clean. All their techs are knowledgeable & respectful. Our guy is Carlos great guy. Efficient to the point and easy to talk too. If you have any HVAC you should definitely call One Hour!”

Charles Senor

10-11-2024

“Always easy to schedule, Jaime keeps it straight and to the point, won't use anyone else.”

Joshfp1VA

10-11-2024

“Really appreciate the quality and reliability of One Hour Heating & A/C. Easy to schedule appointments, and their staff are professional and courteous. I use the services for my main home as well as a rental property. They provide recommendations on maintenance and improvements, but never pushy about it. Highly recommend this team!”

Victoria Hornaday

10-11-2024

“Did a more thorough job with my system than any other company I have used in the path. Pleasant, friendly and respectful while in my home.”