They did a great job. The tech was very thorough and informative. My new mini-split is working well.

Extremely helpful. Talked me through my boiler system over the phone and found the part I needed. The best company in the valley i would never use anyone else if you want it done right.

Our radiant flooring (not originally done by GN) decided to stop working on a really cold night. I called first thing in the morning, and even though Mark was out on a job...he made sure we got our heat back ASAP. What an amazing guy. I highly recommend the Great Northern team. Fantastic people who care about their clients.

Mark has worked on more than one project for us. He is knowledgeable, punctual, reliable and takes pride in doing a job well done. Highly recommend and have!

Mark squeezed us into his day to help with our hot water heater! He was honest, patient, and concise with his explanation on how to maintain and lengthen the lifespan of our water heater. Mark is very knowledgeable and kind. We always appreciate his help!

I was SO impressed how professional and quickly Mark and Matthew worked fixing so many different things for us. They took the time to educate me on what needed to be done and why. I highly recommend this company.

Mark and Matthew did a phenomenal job repairing our exhaust and intake for our heating system - which Had developed a crack from this last winter and the cold! Very professional- they are the only company we will ever use‼️‼️well done Great Northern Heating and Air‼️‼️

We are extremely happy with the product and service that Mark has provided. He is hard working and listens to his customers needs and wants. It is a pleasure doing business with someone who cares and will be there if you have a problem. Unlike other heating and cooling businesses, Mark stays in contact with his customers from start to finish. We highly recommend Great Northern Heating and Air to anyone looking for this service, you can not go wrong with Mark, he is truly a professional. Thank you, Mark & Terrie.

We recently had Great Northern Heating and Air install an air conditioning split unit in our home. The whole experience couldnt have gone better! We are loving our new quiet, energy efficient A/C!Mark does a meticulous, clean install and gives attention to every single detail, which we appreciated greatly. Both he and his wife Terry were very professional and great to work with! We highly recommend them!Kevin & Sundie

Mark and Great Northern Heating and air did an awesome job for us. We love the Fujitsu mini splits and noticed a substantial savings right away, thanks for the recommendation Mark! Their service was fast and professional and his work was top quality, clean and tidy.

I was so impressed with this company as they had an immediate response to my furnace crisis on one of the coldest days of the year! Because of their immediate response, quality work and customer care we hired of them to install our air conditioning system! Top notch company and would definitely recommend!

Nothing but professional! Mark and the team at Great Northern Heating & Air are top notch. They were prompt when responding to our need for service. Excellent customer service and quality work...I would highly recommend these guys!

Mark and Terrie Palmer have the best Heating and Air Company in all of our Flathead Valley with outstanding service and integrity. Mark is so knowledgeable and has provided excellent service in both our home and business. We know we are in good hands with Great Northern Heating and Air!

This guy is a true professional - knowledgable, affordable, trustworthy and very hardworking sums up his small operation. He installed an AC unit for us after we spent years going without because we believed we couldnt afford it. One of the big names in the valley came out and quoted us nearly three times what we paid to have Mark do it. The whole process was extremely quick from call to quote to install, he came right on schedule, communicated everything clearly, and was very conscientious of our home and family. The whole experience was incredibly refreshing and I highly recommend this business for the exceptional service we were provided.

Do great work

Mark does has done a GREAT job with my heating and a/c! Everything from fixing the bad install from original builder to installing a second zone for 2nd story.

Reliable, affordable, trustworthy, extremely knowledgeable, helps to select the best system for your needs & keeps it operating efficiently saving you money and time. There is no better choice in the Flathead Valley!

Wonderful:) The owner was very friendly the unit is amazing and affordable pricing.

Phenomenal work and very reasonable.