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A Leading HVAC Company in Alpharetta, GA

Gagne Heating & Air Conditioning provides professional AC and heating services in and around the Greater Metro Atlanta, GA, area all year long. With over 30 years of industry experience, we specialize in HVAC services for residential homes, commercial businesses, multi-family housing, and new construction, and we offer a range of high-quality, energy-saving products.

We are a fully licensed and insured Georgia Conditioned Air Contractor — license #CN210405. We install and replace heating and AC systems for both residential and commercial use in Alpharetta, GA, and the surrounding area.

Here are some of the professional HVAC services available to all of our valued clients in and around Cumming, Johns Creek, Roswell, Alpharetta, and Fulton County, GA.

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HVAC System Services

It is critical to your HVAC system’s effectiveness, efficiency, and longevity to have an established HVAC company perform essential services, ensuring your home’s heating and cooling systems are in optimal condition. Whether you are looking for a new installation or preventative maintenance, Gagne’s heating and air contractors have you covered.


Whether you need an indoor heating or cooling system, proper installation of the units is essential to the life of the system and its efficiency. Our expert heating and air contractors understand how crucial it is to have functional AC, heating, and air quality systems installed in your home. From duct-free split systems and heat pumps to thermostats and humidifiers, you can expect only the best HVAC installations from Gagne’s HVAC systems experts to keep you and your family comfortable in your home.

Repairs & Replacements

No matter how well an HVAC system was installed, there might be times where you will need a professional HVAC systems expert to repair a faulty thermostat, wiring issues, leaking ducts, or any number of other problems you may encounter. The Gagne team of HVAC contractors is proficient in air conditioning and heating equipment repairs and replacements, so you are guaranteed to receive the best quality service and HVAC products every time. In most cases, Gagne is able to offer free, same-day estimates for replacement.

Maintenance Services

One of the essential, yet most neglected, HVAC services is system maintenance. Your AC and heating units are responsible for conditioning the air and filtering out allergens and pollutants to help keep you and your family comfortable and healthy, so proper care and servicing of the equipment is a mandatory practice. Bringing in the trusted local HVAC contractors at Gagne is an excellent way to identify problems, perform quick fixes, and deter costly repairs. If you want to prevent heating and cooling issues, consider joining the Gagne Comfort Club for annual HVAC maintenance and additional incentives.

Commercial HVAC Company

As a leading HVAC company in Alpharetta, GA, Gagne also performs commercial services for businesses located in the communities that we serve. Our heating and air contractors are trained, certified, and experienced on most commercial HVAC systems. If you are looking for a commercial HVAC company you can trust to handle the heating and cooling needs of your business, turn to Gagne for high-quality HVAC services.

Our HVAC Technicians

Our quality-service HVAC technicians, all of whom are licensed and insured, are trained to address the needs of your home or business specifically.

Each team member of our HVAC company undergoes thorough training so that they can effectively pass on their knowledge to our customers. They can assess your options for thermostats, air quality systems, and additional products and can advise you on what equipment is best to buy for your home or commercial space.

To learn more about the HVAC services Gagne provides to both our residential and commercial clients, please feel free to visit our specific services pages:


Gagne also provides financing options for our customers who are faced with an unexpected repair or replacement of a heating or cooling system.

100% Satisfaction Guaranteed

At Gagne, we are committed to the satisfaction of our customers, which is why we provide the best residential and commercial heating and cooling services in the region. We send out only certified and trained technicians who use the most effective and efficient repair and installation methods available. Additionally, we encourage our valued customers to join the Gagne Comfort Club for preventative maintenance, priority service, and excellent discounts on repairs. For more information on how Gagne can help you with your HVAC needs in and around the Greater Metro Atlanta area, contact us today!

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Fast, Reliable, Friendly Service

If you need the assistance of an accomplished HVAC company, look no further than Gagne. Our friendly service professionals are committed to the comfort and health of you and yours through our unmatched expertise, high-quality equipment, and indoor air quality services.

We proudly serve the following areas throughout Northern Georgia:

  • Atlanta
  • Alpharetta
  • Cumming
  • Roswell
  • Johns Creek
  • Fulton County

For more information on our HVAC services or to schedule an appointment, contact us today!

“Gagne installed new HVAC units for me in the Spring. They did an awesome job and the units are great. If I had known they would make such a difference in the comfort of our home I would have done it year ago. I have recommended Gagne several times and everyone has been equally happy.”

-Dave L.

"The lady I talk on the phone to schedule the technician was brilliant. She promptly understood my issue with the furnace at the basement and scheduled the technician to come and troubleshoot it right away. The technician was courteous and knowledgeable. He identified the issue and we are now waiting for parts to complete the repair. Great service. Thank you"

-Juan P.

“I had a great experience with our Gagne technician. He was on time, very knowledgeable and even went back up into my attic to help me label some vents when he was done and about to walk out the door which was really helpful! I’ve been using Gagne for years…always a good experience.”

Tiffany G.