1,300+ Reviews   |     4.9 Rating  

Heating, Cooling & Electrical Services in Maryland

Serving Montgomery County, Frederick County, Howard County and Carroll County, MD

Are you looking for reliable heating, cooling, or electrical services for your home or business in Maryland? Look no further than GAC Services! Based in Gaithersburg, Maryland, GAC is a family-owned and operated heating, cooling, and electrical company that has set the standard for quality service in Maryland.

For reliable heating, cooling, and electrical services, your Maryland neighbors trust GAC Services! To learn more about our services or to schedule an appointment, contact GAC online or call us at 301-926-3253 today.


Budget-friendly Repairs & Energy-Efficient Air Conditioner Installations

Since our doors opened in 1970, GAC Services has been keeping our customers cool by providing air conditioning services throughout Montgomery County, Frederick County, and Howard County in Maryland. Whether you’re looking for prompt air conditioner repair or you’re ready to upgrade from your unit to a high-efficiency air conditioner, our NATE-certified technicians can help! We service all air conditioner makes and models, regardless of whether or not we installed it.

We sell, install, repair, and perform maintenance service the following cooling equipment:

Contact us now to schedule air conditioning service in your Maryland home »

Click Here to Schedule Service Online



Advanced Heating Equipment Installed & Repaired by Maryland’s Top HVAC Technicians.

When you need heating solutions to keep your home in Maryland warm and comfortable, trust the HVAC experts at GAC Services. Our factory trained and nationally certified heating technicians are armed with the best products and can help you identify the most affordable and energy-efficient way to heat your home.

We sell, install, repair, and perform maintenance service the following heating systems:

Contact us now to schedule heating service in Montgomery County, Frederick County, or Howard County »


Affordable & Reliable Electrical Services From Certified Electricians in Maryland

GAC Services is pleased to offer comprehensive electrical repairs, replacements, upgrades, and installations to customers throughout the Frederick, Howard, and Montgomery County, MD areas.

Contact us now to schedule electrical services in Gaithersburg, MD & surrounding areas »

Choose GAC Services for HVAC & Electrical Services in Maryland Today

When you need professional HVAC and electrical services in Maryland, count on GAC Services. We will provide the quality of service you need at a price you can afford, and we won’t leave until you’re 100% satisfied.

Ready to schedule air conditioning, heating, or electrical service in your Maryland home? Simply contact us online or by phone at 301-926-3253!

The GAC Difference

“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 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 the GAC difference. Contact us to learn more or to schedule service today. We’re looking forward to serving you and hopefully making you a customer for life! 

$100 Off Panel Replacement or Upgrade!

Restrictions may apply. Offer expires on Sep. 30, 2021. ONE COUPON PER CUSTOMER PER VISIT.

expires 09/30/2021 read more  
Schedule Service
$59 Seasonal System Check Original Price $129

Claim our $59 Seasonal System Check, and your second system is only $129! Ensure your system is ready for the season and prevent costly breakdowns.

Filters need replacing, electrical components tested and safeties need to be verified. We do all that and provide advice on how to improve your comfort and reduce your energy costs. For even more peace of mind, we also offer a maintenance program that provides priority service, seasonal tune-ups and 20% discounts on repair.

Schedule your appointment today.

Coupon good for one system, each additional system is only $129! Restrictions may apply. One coupon per visit. Offer expires on Sept. 30, 2021. ONE COUPON PER CUSTOMER PER VISIT.

expires 09/30/2021 read more  
Schedule Service
Need Service? Schedule a service with us today!


Hear What People
Are Saying

1,300+ Google Reviews
4.9 Star Average Rating
GAC sales rep and the installers arrived at my home on time and were professional. They respected me and my home and arrived masked and gloved (much ap...
On-Time Service
100% Satisfaction
Up-Front Pricing
Factory-Trained Technicians
Fully-Stocked Trucks
Respect for Your Home
Membership Perks
High-Performance Seasonal Tune-Ups
20% Discount on HVAC Repairs
10% Off Electrical Repairs
Priority Service
A Trusted Professional on Your Home Service Team
Reduced Diagnostic Fee
Satisfaction Guarantee
Relax, We’ll Contact You!
Monthly Newsletters