Gaithersburg & Surrounding Areas

HVAC Service Map

One Hour Heating & Air Conditioning® of Gaithersburg

4.84

(160078 reviews)

Heating & Cooling Services for Gaithersburg & Surrounding Areas

100% Satisfaction guarantee!

As the leading HVAC service provider in MD 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. One Hour Heating & Air Conditioning® of Gaithersburg is based in Gaithersburg and provides expert heating and cooling services to residents in Gaithersburg 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 (301) 396-7481.

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

Heating, AC & Furnace repairs in Gaithersburg

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 Gaithersburg services the following communities:

Ashton
Beallsville
Boyds
Brookeville
Burtonsville
Cabin John
Clarksburg
Colesville
Comus
Damascus
Darnestown
Derwood
Dickerson
Gaithersburg
Germantown
Glen Echo
Kensington
Montgomery Village
Olney
Poolesville
Potomac
Rockville
Sandy Spring
Spencerville
Suburb Maryland Fac
Washington Grove

We Have a Reputation

For Being Punctual, Friendly and Knowledgable

4.8

(217 reviews)

Sandy Lochary

05-19-2025

“Mr Rojas check my air conditioner system he is good technician”

Susan Andrus

05-19-2025

“Mr Rojas good service for air conditioning system”

Two Peas

05-12-2025

“Gilmer Rojas arrived on time, performed a thorough inspection, and recommended & completed important maintenance on our HVAC system. I really appreciated Gilmer’s explanation of what needed to be done and why.”

Mike Sievers

05-08-2025

“You were hard worker and professional fixed and serviced my systems.”

Xiaofeng Hua

05-07-2025

“Gilmer Roras has done a good maintenance job and friendly. He took time to explain what needed to be done and why. I'm satisfied.”

Patti Connell

05-05-2025

“Very helpful No attitude Gave simple explanations”

Jim Kinkead

04-30-2025

“Rojas did a nice job.”

Brian Paulus

04-25-2025

“Mr Roja excellent job”

Ken M

04-22-2025

“Mr Rojas was a great technician. Very detailed in explaining and patient. 4 stars only because I wish he would have cleaned up after himself (dust) and replaced the tape around our system better as there is air not seeping through and wasn’t before he removed it .”

Edward Burman

04-17-2025

“The technician was very professional and polite he took the time to explain everything he was doing and explained the recommendations”

Special Offers

Mention these discounts at time of service

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$150

HVAC Inspection and Plumbing Walk Inspection

Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply.

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