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FeaturedHVAC Companies in Great Falls, Montana

Gill's Heating & Cooling, Inc.

Top Spot in Great Falls Today 5.00 (66 reviews)(406) 453-8705

Gill's Heating & Cooling, Inc.

Gill's Heating & Cooling provides HVAC installation, service and repairs for residential and commercial customers in and near Great Falls. Its Bryant installation options include traditional ducted systems, ductless units and commercial units.

Last Updated September 28, 2026.

Business Highlights
  • Gill's Heating & Cooling has been locally owned and operated since 1992.
  • Its team is fully licensed and insured.
  • Its technicians are highly trained and experienced in heating and cooling.
  • It offers a 100% satisfaction guarantee.

Service Area

Great Falls, Black Eagle, Ulm, Simms, Cascade, Wolf Creek, Sun Prairie, Stockett, Fort Benton, Lincoln, Belt, Carter, Fairfield, Choteau, Loma and Geraldine.

Featured Local Business

Gill's Heating & Cooling, Inc. is one of 6 HVAC companies ProsGrade lists in Great Falls, Montana.

Featured
Featured on ProsGrade
Listing details

4 services listed, including Heating, Cooling and Ductless. Open weekdays, closed on weekends. Rated 5.0 from 66 reviews.

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

How This Business Compares

How Gill's Heating & Cooling, Inc. compares with the other 5 HVAC companies on ProsGrade in Great Falls, using public Google ratings and review counts.

  • Ranks in the top quarter of the 6 Great Falls HVAC companies on ProsGrade by Google rating and review volume.
  • Rated 5.0 on Google, at or above the 4.8 average of other Great Falls HVAC companies on ProsGrade.
  • Has more Google reviews (66) than 4 of the 5 other Great Falls HVAC companies on ProsGrade.
  • One of 3 Great Falls HVAC companies on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

4 services
  • HeatingFurnaces: repairs, replacements, new installations and tune-ups
  • CoolingAir conditioners: repairs, replacements, new installations and tune-ups
  • DuctlessMini-split AC installation, repair and tune-ups
  • Indoor air qualityHRV and ERV installations

Reviews

What customers say

Customers praise the quality of the work and courteous service. A mini-split customer appreciated the system explanation and spotless cleanup, while a customer describing a complex installation praised the team's communication and efforts to get it running.

Customer Reviews

Mike Best

Gill’s has installed 2 furnaces in 2 homes and now a mini-split A/C in loft that will be a total game changer next Summer. Incredible attention to detail in all of the work. Always courteous and responsive to every request. 10 rating across the board! I just learned that I gave a 3 star rating to this 5 star company! Totally a mistake, my praise in this text conveys my complete satisfaction. Sorry, Gill’s.
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Lisa Benash

It was very nice experience. Randy was very polite and respectful and did an awesome job. Thank you.

Thomas Barrett

I’ve had Gill’s work on three separate projects over the last four years. Their prices are fair. Their work is excellent and their customer service is better. You cannot go wrong with them. I highly recommend.

James Baguley

We had a house built for us by KIB homes and KIB uses Gills heating and cooling as their HVAC contractor. I took the initiative to contact Gills before construction started in order to have some input into the system installed. I met with Bret who is the owner of the company. He went over the house plans in detail with me at his office. The system he designed is, for lack of a better term, spectacular. A Bryant variable stage 98% efficient furnace, a high efficiency AC unit along with a fresh air energy recovery ventilator, an electrostatic air cleaner and a zoned system. Not only was Bret very helpful in helping me pick out a system, he actually seemed to enjoy working with me and commented that it isn’t very often that he gets to have input from the homeowner during the design of a system. KIB built a lovely home for us and Gills provided a system worthy of such a nice home. There were some kinks that needed to be ironed out primarily because Bryant initially provided a faulty AC unit. The system was quite complicated using the latest evolution controller and all the various components need to communicate. Gills was fantastic in their efforts to get everything running as it should in what is quite a complicated setup. The communication with them was excellent and frequently the owner actually answered the phone. Bonnie was excellent at keeping me informed and Jake who spent quite a few hours getting things up and running ( on one occasion driving to our home in Carter with horrendous road conditions) deserves some kind of commendation. I can only say that I am very glad that Gills heating and AC was my contractor. You will not go wrong with them.
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Charles Blevins

Jake came out to finish the install of my mini splits today and absolutely knocked it out of the park. He was professional, knowledgeable, and just an all-around awesome guy to work with. He took the time to make sure everything was set up perfectly, explained how the system works, and left the place spotless. You can tell he really takes pride in what he does. Huge thanks to the whole team for sending someone as solid as Jake — if you need HVAC work done, ask for Jake. You won’t be disappointed!
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Frequently Asked Questions

Does Gill's Heating & Cooling offer heat-emergency service at any hour?

A technician is available 24/7 for heat emergencies.

Can Gill's Heating & Cooling service HVAC equipment from any brand?

Gill's can service, maintain and install every brand of heating and air-conditioning equipment.

Does Gill's Heating & Cooling offer free estimates?

It offers free estimates.