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Heating, Air Conditioning & Electric in Maryland


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Meet GAC Services

Maryland's #1 Residential Contractor

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Experience the GAC difference today.
Providing Award Winning Service
to our customers in Maryland.
Nationally Awarded
Bryant Dealer in the U.S.

Cooling, Heating, Electric & More

We’re setting new standards in the Maryland HVAC and electrical market one home at a time.

The GAC team focuses on whole home comfort for Maryland residents.

The GAC team focuses on total home comfort for Maryland residents.

“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!

While our name may have changed, the way we do business has not. We proudly provide:

Up-front pricing. 100% satisfaction guarantee. On-time service. Factory trained and nationally certified technicians. Respect for your home or business.

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 the GAC difference.

Whether you’re looking for residential or commercial HVAC or electrical services, GAC Services is the company to call in the Maryland area!

Featured Service for Cooling Season: AC Services

AC Repair in Gaithersburg & Surrounding Maryland Areas

A broken air conditioner is something nobody wants to deal with, especially during the hot, humid days common to the Gaithersburg and Frederick areas. Your home should be a cool relief from the outdoors, which is why when you need air conditioner repair, you need it fast. If you’re tired of dealing with the annoyance and discomfort of a broken-down air conditioner there’s only one name you need to know—GAC Services!

Air Conditioner Installation & Replacement in Gaithersburg Area

GAC Services has been installing air conditioners throughout Montgomery and Frederick counties—including Gaithersburg and Frederick—since 1970. Our HVAC technicians will work with you to determine the best make and model air conditioner for your home and work diligently through the installation process to ensure the installation is completed on-time and on-budget. For air conditioner installation in Gaithersburg, let us show you why we put the “AC” in GAC! We also serve:

Air Conditioner Installation in Bethesda | Air Conditioner Installation in Chevy Chase | Air Conditioner Installation in Clarksburg | Air Conditioner Installation in Derwood | Air Conditioner Installation in Frederick | Air Conditioner Installation in Gaithersburg | Air Conditioner Installation in Germantown | Air Conditioner Installation in Kensington | Air Conditioner Installation in Laytonsville | Air Conditioner Installation in Montgomery Village | Air Conditioner Installation in Olney | Air Conditioner Installation in Potomac | Air Conditioner Installation in Rockville | Air Conditioner Installation in Silver Spring

AC Maintenance in Gaithersburg & Montgomery County

At GAC Services, we can perform an annual AC maintenance tune-up—preferably in the spring before the cooling season starts when you’ll rely on your system the most. We’ve provided the Montgomery and Frederick County areas with cooling services since 1970, so you know you’re receiving the best possible air conditioner tune-up around!

Electricians in Gaithersburg & Surrounding Areas

Your #1 choice for cooling and heating services can now be your #1 choice for electricians in Maryland. GAC Services is pleased to offer comprehensive electrical services to our customers throughout the Frederick County, Howard County, and Montgomery County, MD areas.

The licensed Gaithersburg-based electricians at GAC Services are trained in the following electrical services:

Our master electricians are ready to tackle or troubleshoot your toughest electric problems and help you save money on your energy bills in the process. We also provide a comprehensive list of electrical safety tips to keep your Maryland home safe and secure from electrical issues.

Featured Service for Heating Season: Furnace Services

Furnace Repair in Gaithersburg & Surrounding Maryland Areas

Coming home to a broken furnace is never a welcoming situation, especially during the cold winter months in our Gaithersburg area. Below-freezing temperatures can make for a very uncomfortable home environment for family, friends, and even pets. At GAC Services, we repair gas, electric, and propane furnaces throughout Gaithersburg, Frederick, and the surrounding Maryland areas.

Furnace Installation & Replacement in Gaithersburg Area

Most furnaces will last 10-12 years with proper maintenance. But if you’re looking to replace your old, aging system, GAC is ready to help. We install the most advanced products designed to save you money while keeping you comfortable, whether you’re looking for a gas furnace, propane furnace, or variable speed furnace (for ultimate efficiency!). For furnace installation in the Gaithersburg area, trust GAC Services!

Furnace Installation in Bethesda | Furnace Installation in Chevy Chase | Furnace Installation in Clarksburg | Furnace Installation in Derwood | Furnace Installation in Frederick | Furnace Installation in Gaithersburg | Furnace Installation in Germantown | Furnace Installation in Kensington | Furnace Installation in Laytonsville | Furnace Installation in Montgomery Village | Furnace Installation in Olney | Furnace Installation in Potomac | Furnace Installation in Rockville | Furnace Installation in Silver Spring

Furnace Maintenance in Gaithersburg & Montgomery County

Your heating system should undergo a full maintenance tune-up once a year—generally in the fall before heating season begins. We offer comprehensive maintenance plans to ensure your system is up to code and operating efficiently. Contact GAC Services to schedule heating system maintenance in Gaithersburg, Frederick, or the surrounding Maryland area today. And, depending on what our team finds when they inspect your system, we also offer furnace repair and furnace installation/replacement if necessary too!

Hear what other satisfied customers are saying...

“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
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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.