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Gaithersburg, MD
Gaithersburg, MD
Bringing Comfort Home
With Expert AC 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
K L
08-05-2025
“Mr. Gilmer Rojas Rodriguez was very professional and thoroughly explaining how the HVAC system .”
John Goetzke
08-05-2025
“Mr. Rojas provided excellent and efficient service - I am always very grateful for the hard work of the professionals at One Hour AC&H”
Lois Wannen
08-04-2025
“Mr Rojas performed a complete check on 2 systems. He took his time and then explained results including showing me pictures. Felt comfortable with his analysis and recommendations. Nice man.”
Joshua Kremer
08-03-2025
“Good work, but very expensive”
Anna Murphy
08-02-2025
“Mr Rojas diagnostic good my system”
leo collins
07-16-2025
“MR Rojas was a pleasure having you. Thank you for your services.”
Hani Aljufri
07-14-2025
“Mr Rojas checked my system today, very fast and efficient diagnosed it right away professionally. Thank you 😊”
Chris Pate
07-13-2025
“Mr Rojas was super helpful, fixed everything right away!”
Cindy Vickers
07-09-2025
“Mr Rojas kept me informed of what are the issues and did a complete service. He was professional and was thorough.”
Kevin Orr
07-07-2025
“Mr. Rojas helped a lot, and worked really well on my HVAC issue!”
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
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
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.
