GAC Services

Nationally-Awarded Heating & Cooling Company in MD

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Air Conditioning Repair, Maintenance & Special Installation Financing

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

Our air conditioning services include:

  • AC 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 air conditioner or replace your old cooling system, we choose to install Bryant air conditioners.
  • AC 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.
  • AC maintenance & tune-ups – You can also protect your cooling investment by signing up for an AC 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!

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

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

Why Choose GAC for Your Bryant Air Conditioner 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.

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 schedule service today!

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

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Join GAC's Prime Maintenance Membership

  • High-performance seasonal tune-ups
  • 20% discount on heating and cooling services
  • 10% off electrical repairs
  • Emergency service
  • Reduced diagnostic fee
  • And more!
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Financing Options Available

At GAC, we understand how important a functioning HVAC system is for your home. This is why we offer flexible financing options to help you take care of your new HVAC purchase, so you can get back to taking care of what matters most to you.

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Priority Maintenance

A well-maintained HVAC system can save you from having to invest in costly repairs down the road. Learn more about the priority maintenance services offered by GAC Services.

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