Request an Estimate
  • This field is for validation purposes and should be left unchanged.

Greater Atlanta’s Trusted HVAC Company

Gagne Heating & Air Conditioning provides professional and reliable local indoor 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, commercial, 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 communities surrounding the area.

Here are some of the professional HVAC services available to all of Gagne Heating & Air Conditioning’s valued clients in and around Cumming, Johns Creek, Roswell, Alpharetta, and Fulton County, GA:

Read More


Whether you need an indoor heating or cooling system installed, proper installation of the units is essential to the life of the system and its efficiency. Our expert HVAC 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 humidifier installations, you can expect only the best HVAC installations 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 contractor to repair a faulty thermostat, wiring issues, leaking ducts, or any number of other problems you may encounter. The Gagne team of HVAC contractors are 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.

Our Technicians

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

Each team member 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 can advise you on what equipment is best to buy for your home or commercial space.

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!

Contact Us

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.