Professional and Friendly: That’s how we do business!

Nationally-Awarded Heating & Cooling Company in MD

Heating Repair, Maintenance & Special Installation Financing

Since our doors opened in 1970, we’ve been keeping our Maryland customers warm with our heating services in Montgomery and Frederick counties. Whether you’re looking for prompt heating repair or you’re looking for a new, energy efficient unit, our NATE-certified technicians are experts in all heating system makes and models.

Our heating services include:

  • Heating installation & replacement – GAC Services is committed to providing our customers with the best heating and cooling products and customer service in Maryland. That’s why when you call us to install an heating system or replace your old unit, we choose to install Bryant heating systems.
  • Heating repairs – As always, we offer up-front pricing on all of our repairs—providing you with pricing based on the job, not by the hour.
  • Heating maintenance & tune-ups – You can also protect your heating investment by signing up for a maintenance plan with GAC. We’ll inspect your unit every year, catching major repairs before they happen and allowing you to extend the life of your equipment.

Contact us to schedule service today!


0% Financing for 12 Months When Purchasing a New Bryant HVAC System

When you call GAC Services to install a Bryant heating system in your home this winter, you’ll enjoy 0% financing for 12 months. So stay warm this winter with a new Bryant heating system, installed by the trusted team at GAC Services.

Why Choose GAC for Your Bryant Heating System Installation

We are a Bryant® Factory Authorized Dealer in Maryland, and our HVAC technicians are industry certified and factory trained to install Bryant air conditioners in Montgomery County and Frederick County. When it comes to the best HVAC contractors in Maryland, there’s a reason why residents in the Old Line State choose GAC Services. Our award-winning HVAC services include accolades such as the

  • Bryant Dealer of the Year
  • ACCA Residential Contractor of the Year
  • Eight-time recipient of the Bryant Medal of Excellence (MOE) award

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.


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 schedule service today!

We’re looking forward to serving you and hopefully making you a customer for life!

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