227 E. Deer Park Drive, Gaithersburg, Maryland 20877
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(877) 210-6812
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Maryland’s Choice for HVAC and Electrical Services

Experience Whole Home Comfort!

When you need an expert to repair, tune-up or replace your heating or cooling system you can always trust our professionals. Our mission is to provide you, our Maryland customers with the best service for your total comfort needs. We pride ourselves on looking at the “whole picture” when it comes to your comfort – not solely the heating and air conditioning equipment.

Meeting All Your Air Conditioning and Heating Needs in Maryland Since 1970

When you need a reliable heating and air conditioning company in Maryland, put your trust into the experts at GAC Services (previously Gaithersburg Air Conditioning & Heating). Whether your HVAC system breaks down, you need a new furnace installation in your new home, or you’re simply looking to upgrade to a more efficient air conditioning system, we’ve got the experience and tools to help.

As one of the largest heating and air conditioning companies located in Gaithersburg service the Maryland area, GAC Services has been the number one choice for Montgomery and Frederick County residents since 1970. From heating repair, air conditioning repair, tune-ups and maintenance plans, we have you covered during all four seasons.

When you hire GAC, you’ll benefit from our professional and honest staff as well as our experienced technicians—from the first phone call to the completion of service, our goal is to provide the best service for your total home comfort needs.

Contact us today for award-winning HVAC services in the Gaithersburg, Frederick, and surrounding Maryland areas!

Why Choose GAC as Your HVAC Company in Maryland?

What makes GAC Cooling & Heating rise to the top is that we look at the total picture to provide our customers with the utmost comfort. Instead of solely focusing on the heating and air conditioning equipment, we examine all the factors that affect a home’s comfort level. After assessing these issues, we are also available to assist customers on the questions and concerns they may have, such as why their electric bills are high and ways to lower air conditioning costs.

When you choose GAC as your HVAC company in Maryland, a lifelong relationship is built. We strive for long-term customers, which is why every appointment is highly regarded, with knowledgeable technicians that show up on time, ready to answer your questions. We also provide up-front pricing and free estimates on HVAC system replacements. In fact, our trained technicians arrive with a fully-stocked truck so that all the necessary parts are available to complete the job right the first time around.

Our Air Conditioning & Heating Services

In addition to last minute air conditioning repair and heating repair services, we also offer annual HVAC tune-ups to improve the efficiency and longevity of your equipment. Maintenance plans are also available and provide customers with priority service, seasonal tune-ups, and a discount on breakdown repairs. With these membership plans, customers know that they can count on us at any time.

If you’re interested in purchasing a new furnace, air conditioner, or heating system, we install top-of-the-line products from manufacturers like Bryant. Besides these units, we can also install products that increase the air quality in your home, such as air cleaners and whole house humidifiers.

Experience Whole Home Comfort with Heating & Cooling Services from GAC

With a strong reputation and knowledge of Montgomery County, Frederick County, and surrounding Maryland areas, we already have tens of thousands of satisfied customers relying on our heating and cooling services each day. In fact, GAC Cooling & Heating has been ranked number one for the Mid-Atlantic region and continues to receive numerous awards and customer testimonials.

Our mission is to provide you, our Maryland customers, with the best service for your total comfort needs. We pride ourselves on looking at the “whole picture” when it comes to your comfort – not solely the heating and air conditioning equipment.

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


You’re one step away... from experiencing award winning HVAC and electrical service.

Hear what other satisfied customers are saying...

"Your technicians are always polite, professional and personable. The gentlemen who performed our new system installation were a true team, and a real pleasure to have around!

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The information on this website is for informational purposes only; it is deemed accurate but not guaranteed. It does not constitute professional advice. All information is subject to change at any time without notice. Contact us for complete details.