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Northern Virginia, VA
Northern Virginia, VA
Heating, AC & Furnace Repairs in Northern Virginia, VA
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.
Hours of Operation
We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:
Monday
9:00 AM - 5:00 PM
Tuesday
9:00 AM - 5:00 PM
Wednesday
9:00 AM - 5:00 PM
Thursday
9:00 AM - 5:00 PM
Friday
9:00 AM - 5:00 PM
Saturday
Closed
Sunday
Closed
HVAC Services Have Great Guarantees
Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, were an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForward® pricing guides for your benefit, and will pay you back for being even one minute late to an appointment.
Mason is an excellent technician. His assessment and remediation of my system were excellent and greatly appreciated. His diligence also provided the best solutions for the best performance of my HVAC while ensuring the best value for my dollar! Thank you!
Our original HVAC company gave us a an estimate to replace our entire HVAC system because of a problem we were having. I called Modern Mechanical and they sent out a tech within 2 hours. He ran his test on our air handler and heat pump and determined we really DID NOT require a complete HVAC replacement. All he did was to add some additional refrigerant into the heat pump to bring it up the required amount. Did some additional upgrades and all is well . Jamie was the tech and did a GREAT job explaining what he felt the problem was and DID NOT require a new HVAC SYSTEM. He is a great representative for Modern Mechanical and I will now use them for all our future HVAC REQUIREMENTS. 👍👍👍
While I was not pleased to be replacing my system after only about 5 years with two compressor failures, working the proposal with Bill Blair was efficient and responsive to my situation and needs. The install crew was neat and efficient. The techs were very polite and worked as a team. The system is running very well.
Our technician, Gabe, was very friendly and seemed very knowledgeable. He quickly identified the problem and explained various options. Glad I called Modern Mechanical to troubleshoot our A/C problem.
Ken and Ludwig did a fantastic job installing a gas line for a customer on a project in Sterling. Highly recommend using them.
Here For You
When You Need Us Most!
'Round the Clock Availability
No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee
We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide
Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®
We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.
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