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Gaithersburg, MD
Gaithersburg, MD
Bringing Comfort Home
Gaithersburg HVAC Services
One Hour Air Conditioning & Heating® of Gaithersburg
4.8
Heating, AC & Furnace Repairs in Gaithersburg, MD
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.
We Have a Reputation
For Being Punctual, Friendly and Knowledgeable
4.8
Paul Coker
10-16-2025
“Mr Rojas was very professional and knowledgable. He did a great job!”
Ati Kadarmanto-Olson
10-15-2025
“Our service guy, Damon, was very professional and polite. Explained everything he did. We are very satisfied with his service.”
Enoch
10-14-2025
“Sebastian and Donald are very professional and provided me great service during the duct cleaning.”
Stacy Taylor
10-10-2025
“Christian Sosa Rodriguez was a very professional technician! I enjoyed his visit today ! I was under warranty so there was no charge for his visit!”
Veronica Cheeks
10-07-2025
“Explained everything needed and showed pictures of possible issues. Added parts to aid in eliminating future problems. Very knowledgeable and professional.”
Valerie Brockmeyer
10-03-2025
“Mr Rojas was my service technician today. He did an excellent and very thorough job inspecting my indoor and outdoor heating and air systems. He recommended and carried through with needed repairs, explaining and showing me throughout the process what was being done. He was very pleasant and professional and was a pleasure to deal with.”
TT jones
09-30-2025
“Mr Rojas did good job in my system”
Ashley Mercer Schoen
09-29-2025
“Mr Rojas was very helpful today in our hvac maintenance !”
Jo Shifrin
09-26-2025
“Mr Rojas did good job in my system”
Sharon Grzanka
09-25-2025
“Mr Rojas did an excellent job as usual.”
Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, we’re 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.
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.
Financing Available!
Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.
Hours of Operation
We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:
Monday
24 hours
Tuesday
24 hours
Wednesday
24 hours
Thursday
24 hours
Friday
24 hours
Saturday
24 hours
Sunday
24 hours
Authority Brands is the leading provider of in-home services, building brands that support the success of franchisees as well as better the lives of the homeowners we serve and the people we employ.
