1,300+ Reviews   |     4.9 Rating  

About GAC Services

Your Trusted Maryland HVAC Contractor & Electrician

GAC Services is proud to be a family-owned and operated HVAC and electrical company with over 50 years of experience serving Gaithersburg, Maryland. We provide comprehensive residential and commercial services to meet the needs of homeowners and businesses throughout Montgomery County, Frederick County, and Howard County.

Since we opened our doors in 1970, we have satisfied tens of thousands of customers throughout Maryland. Back then, we were known as Gaithersburg Air Conditioning & Heating. Our name may have changed, but the way we do business has not. Our ability to deliver professional and reliable HVAC services has never wavered over the years because we remain dedicated to customer satisfaction and fair employee treatment.

For top-rated heating, cooling, and electrical services in Maryland, please call us at 301-926-3253 or contact us online.

Our Mission & Values

At GAC, we stand firmly behind our mission statement and core values. They serve as our guiding principles and have been at the heart of our company since we started doing business more than half a century ago.

Mission Statement

Our mission is to build long-lasting client relationships by providing professional, honest, reliable, and valuable personalized indoor comfort and energy solutions.

Core Values

Our values include:

  • People First
  • Bring More Than You Take
  • Leadership at All Levels
  • Whatever it Takes
  • Win the Day

To work with a company that stands behind its values, please call GAC at 301-926-3253 today.

The GAC Difference

Not all HVAC and electrical contractors are created equal. We stand out because our core focus is to exceed our customers’ expectations with friendly and honest service, not cushion our bottom line with upselling and empty promises. In fact, we are more than just an HVAC and electrical contractor—we improve people’s lives. We truly care about our customers and want to keep them comfortable! This commitment to excellence and customer service is what we consider the GAC difference.

Here are a few reasons why your neighbors love working with us:

  • Upfront pricing
  • 100% satisfaction guarantee
  • On-time service
  • Factory-trained and nationally certified technicians
  • Fully-stocked trucks
  • Respect for your home

Contact us to experience the GAC difference for yourself. We look forward to serving you and hopefully making you a customer for life!

Our Service Area

We provide heating, cooling, and electrical services throughout Montgomery County, Frederick County, and Howard County, Maryland. If you own a home or run a business in the Gaithersburg area, we can serve you!

Please call us at 301-926-3253 to clarify our service area and schedule an appointment.

Learn More

There’s a lot more about us we wish to share with you! Check it out: 

  • Awards: Our commitment to excellence has earned us numerous awards over the years, including Bryant Dealer of the Year, “Best of Montgomery County,” and the Angie’s List Super Service Award five years running.
  • Licenses: We are happy to share our license numbers and certifications so you know we’re qualified to perform the best possible HVAC and electrical services in Maryland.
  • Reviews: We have a strong reputation for going above and beyond with our professional, honest, and reliable services. But don’t take our word for it—find out what your neighbors are saying about us!
  • Careers: Are you looking to join a team of dedicated, passionate HVAC contractors and electricians? GAC has a career for you! Check out our current job postings and apply with us today.

To learn more about GAC or schedule HVAC and electrical services in Maryland, please call us at 301-926-3253 or complete our online contact form.


$75 Off Panel Replacement or Upgrade!

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

expires 07/31/2021 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 July 30, 2021. ONE COUPON PER CUSTOMER PER VISIT.

expires 07/31/2021 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!
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