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Business ProfileHVAC Companies in Alpharetta, Georgia

Gagne Heating & Air Conditioning

Taking Calls in Alpharetta Today 4.90 (1,656 reviews)(678) 806-7979

Gagne Heating & Air Conditioning

Gagne Heating & Air Conditioning is based in Alpharetta and provides HVAC services for homes and businesses. Its residential repair process starts with finding the cause of a problem before recommending a fix.

Last Updated October 2, 2026.

Business Highlights
  • Gagne is family-owned and operated.
  • Gagne has more than 30 years of HVAC experience.
  • Gagne is a Carrier Factory Authorized Dealer.
  • Gagne offers a 100% satisfaction guarantee.
  • Its HVAC technicians are licensed and insured.

Service Area

Alpharetta, Cumming and Roswell.

Local Business Taking Calls

Gagne Heating & Air Conditioning is one of 11 HVAC companies ProsGrade lists in Alpharetta, Georgia.

Taking Calls
Taking calls through ProsGrade
Listing details

11 services listed, including Air conditioning repair, Air conditioning tune-ups and Air conditioning installation and replacement. Open Monday to Saturday. Rated 4.9 from 1,656 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Gagne Heating & Air Conditioning compares with the other 10 HVAC companies on ProsGrade in Alpharetta, using public Google ratings and review counts.

  • Ranks in the top half of the 11 Alpharetta HVAC companies on ProsGrade by Google rating and review volume.
  • Has more Google reviews (1,656) than 8 of the 10 other Alpharetta HVAC companies on ProsGrade.
  • One of 11 Alpharetta HVAC companies on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

11 services
  • Air conditioning repaircentral AC and ductless mini-split systems
  • Air conditioning tune-upsfilter checks; condenser and evaporator coil cleaning
  • Air conditioning installation and replacementcentral air conditioners, heat pumps and ductless mini-splits
  • Ductless mini-split servicesinstallation, repair and maintenance; zoned heating and cooling
  • Heating and furnace repair
  • Heating tune-ups
  • Furnace and heating installation and replacement
  • Heat pump repair, installation and maintenance
  • Comfort Club HVAC maintenance planongoing preventive HVAC care
  • Commercial HVAC repair
  • Commercial HVAC maintenance

Reviews

What customers say

Customers praise the technicians’ knowledge and professionalism. One customer appreciated a technician’s explanation of the problem and cost before a repair began; another recalls Gagne replacing a furnace the next day during winter.

Customer Reviews

Justin Sirrine

Gagne is the best HVAC company I have ever had the pleasure of working with. My experience started with Rick, who quoted me on some indoor air quality products and a new gas furnace. He spent a lot of time with me to make sure I understood what I was getting, and how it compared to the alternatives. He also came prepared with lots of other useful information about HVAC work, like what due diligence questions you should ask any contractor you work with, what their standard work scope is (also shared by the other two companies I was quoted by, but Gagne's is one or two cuts above), and which companies in the area are owned by PE (not all PE Is bad, just understand owner incentives). They installed the new equipment today, and the installation quality from John, Rusty, Tyler, and Philip is BEAUTIFUL and FUNCTIONAL. The plenum box they built contained dampers, I didn't even ask for those. Lots of neatly applied mastic on all the equipment connections, whereas my old furnace was leaky and connected with duct sealing tape. John's installation for our steam humidifier was so thoughtful and immaculately executed: he picked up some copper line for the cold water intake (not included with the OEM kit), asked me where & how I wanted everything routed, and covered details of operating the unit with me. He tied the copper line to the wall with metal anchors and electrical taped the contact points to avoid galvanic corrosion. John then troubleshooted some wiring on my existing thermostat to make sure everything operated smoothly. There were so many instances today during installation where it dawned on me how thoughtful their process is, from end-to-end. For example: (1) their use of Daiken furnaces with stainless steel heat exchangers, which are less likely to crack (potentially leaking CO into your house) and have a lifetime warranty, (2) their future proofing of my system with this furnace which will mate nicely with an inverter AC unit down the road when our AC reaches end-of-life, (3) some unprompted (but welcome!) quick tips from Rick on how to maintain my specific AC outdoor condenser, which they didn’t even install (!), and (4) their sealing of all the components together so the system would not pull in attic air. You would hope that this level of quality would be at least somewhat normal but in my experience with some other players, it is not. You would think all of this would cost an arm and a leg, but their pricing was quite reasonable. During the quoting process Gagne was my third quote; I actually cancelled my 4th & final in-home estimate after Rick walked me through their process and pricing. I truly got the feeling that all of these folks were recommending and installing products in a manner they would want done in their own homes. Of course nobody wants to pay for HVAC, especially if it’s an unplanned expense when it’s super hot or cold outside, but if you need any work done on your home’s systems I highly highly recommend working with Gagne.
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Mark Lala

I’ve been doing business with Gagne Heating & Air Conditioning for about 10 years, and they continue to be outstanding. 10 years ago, I needed a brand new AC/heating system, and they were amazing from day one. Their customer service is consistently strong, their technicians are knowledgeable, professional, and easy to work with, and the warranty I’ve had with them all these years is worth its weight in gold. What really sets them apart is how proactive they are — they regularly reach out via text and email to remind me when my bi-annual check-ups are due. It’s one less thing I ever have to think about. Because they’ve been so reliable over the past decade, there was never any question about who I’d use again when it came time for an upgrade. Most recently, they removed my manual damper and converted the system to an automatic zoned setup. Their pricing was very competitive, the quality of the work was outstanding, and they completed the installation the same week. I wouldn’t hesitate to recommend Gagne Heating & Air Conditioning to anyone — reliable, professional, efficient, and truly a company you can trust.
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Ann Marcinski

Everyone that I have dealt with at Gagne is exceptional. Their level of professionalism and knowledge is incredible. I have had two furnaces and two air conditioners installed over the last four years and I highly recommend Gagne. They are a family business and it shows in everything they do. They are so neat and efficient, there was not a spec of dust left behind. Yes, I highly recommend Gagne Heating and Air.
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Paul Santiago

Always great service and support. Gagne maintains my systems and ensures they are all operating safely and efficiently.When I had an issue requiring an immediate replacement of my furnace during the height of winter, they saw to it that it was replaced the very next day, without delay. Eric, Rick, and the rest of the team are all great people and go out of their way to do the right thing in support of their customers… and I appreciate that most about them.
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Maulik Shah

I can’t say enough good things about my experience with Daryl Pitts from Gagne Heating and Air Conditioning LLC. He was on time, respectful of our home, and very thorough in his inspection and repair. He explained the problem in plain language, showed me exactly what he was doing, and made sure I was comfortable with the cost before proceeding. The work was done quickly and correctly, and our system has been running great since. It’s clear that Daryl is both highly skilled and customer-focused. I feel confident knowing we have a trustworthy HVAC company to call, and Daryl will be the first person I ask for.
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Frequently Asked Questions

How often does Gagne recommend an AC tune-up?

Gagne recommends AC maintenance at least once a year, ideally before summer.

How long does an AC installation take?

Timing depends on the equipment, home layout, existing system, ductwork and whether other components need updating. Gagne can provide a clearer timeline after evaluating the home.

Does Gagne offer financing for an AC replacement?

Yes. Financing options are available for qualified homeowners.

Does Gagne offer emergency ductless mini-split repairs?

Yes. Gagne offers responsive service for emergency ductless mini-split repairs.