Based out of Gaithersburg, MD, GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County, Howard County, and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business.
“What do our customers want?”
That’s the question that’s been driving the way we do business at GAC from the very beginning—back when you might have known us as Gaithersburg Air Conditioning & Heating, or maybe as GAC Cooling & Heating!
While our name may have changed, the way we do business hasn’t.
Up-front pricing. 100% satisfaction guarantee. On-time service. Factory trained and nationally certified technicians. Respect for your home.
These are just a few reasons why your neighbors love working with GAC. It is this commitment to excellence, along with our friendly and honest professionals that has helped us satisfy tens of thousands of customers throughout Maryland over the years. And it is this that we consider…
"We wouldn’t think of using anyone else. We have always been very satisfied with your service and your wonderful staff. ****** rating!"
John Micheal, MD
Awards & Acknowledgement
Your neighbors aren’t the only ones to refer GAC Services. Our high standards and commitment to excellence in the HVAC and electrical industries have earned us numerous awards, accreditations, and acknowledgement over the years. We take pride in our awards as we believe they are a reflection of our great customer service.
Highest ratings in the Washington Consumer Checkbook Magazine (since 1978!)
Rated as “Best of the Best” and “Old Reliable” in Washington Magazine
Recognized as one of the “5,000 Fastest Growing Companies in America” by Inc. Magazine in 2010
Voted “Best of Montgomery County” by readers of Gazette Magazine is 2012
Recognized with Angie’s List “Super Service Award” for the past five years
The GAC Team
Friendly, Honest, Professional
Our people represent the foundation of the GAC difference, which is why we place such a strong focus on training and providing excellent customer service. Our background-checked, uniformed technicians are not only factory trained, but also nationally certified.
And our training doesn’t stop at our technicians! Our office staff is highly trained to answer all your cooling, heating, and electrical questions.
After speaking with any member of the GAC team, you’ll have no problem understanding how we’re able to make so many lifelong customers.
We proudly serve the following locations in Maryland:
Montgomery County: Ashton, Barnesville, Beallsville, Bethesda, Boyds, Brinklow, Brookeville, Burtonsville, Cabin John, Chevy Chase, Clarksburg, Damascus, Derwood, Dickerson, Gaithersburg, Garrett Park, Germantown, Glen Echo, Kensington, Laytonsville, Montgomery Village, Olney, Takoma Park, Poolesville, Potomac, Rockville, Silver Spring, Spencerville, Urbana, Washington Grove
Howard County: Clarksville, Columbia, Cooksville, Dayton, Ellicott City, Fulton, Glenelg, Highland, Woodbine
Frederick County: Adamstown, Braddock Heights, Buckeystown, Frederick, Ijamsville, Middletown, Monrovia, Mt. Airy, New Market