Mon–Fri 7:30 am – 5:30 pm

(970) 493-0866
Now in Fort Collins — right in the middle of where we work · Opens September 2026

Reviews

5.0 on Google. Letters with names on them.

The score is 141 reviews at 5.0. The stories below are the longer ones — Debbie’s valve, the Blauls in Windsor, Bill in Red Feather. Nextdoor neighbors named us a Neighborhood Fave five years running.

J

I have had Grant here twice now to work on our very complicated system. Both times he (and his staff) have…

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Jeff Struck8/16/2026

J

Grant was extremely knowledgeable and took the time to thoroughly explain everything he was doing.

Read full review on Google

Jenny8/15/2026

See all 141

Opens Google so you can read the profiles, photos, and full write-ups — we don't host a copy.

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What they wrote us

When our furnace stopped working the large corporation I had been using came out and said I needed a new $800 part or a new furnace, then left. I tried calling them three times and only got a call center. Two other large companies spent hours trying to talk me into a new furnace, AC, and air cleaner. A friend recommended Grant’s. Grant inspected the furnace, said it had a few more years in it, and all I needed was a new valve. His technician replaced the valve, inspected and cleaned the furnace for less than $500. They treat you like family rather than just another client.

Debbie Arnold

A year and a half ago Grant and his team replaced my furnace and installed AC for the first time. It was in the high 90s in July. Four and five techs worked the job for 10 hours to finish in one day. They are not paid to “sell” more work; they are there for the customers’ needs. Small businesses drive our economy. Please support local small business.

Mark and Leslie BlaulWindsor, CO

Grants HVAC has done two major jobs for me at our home in Red Feather Lakes. Honest estimates, then high-quality work on the promised schedule. I’ve used other contractors in the Fort Collins area and been disappointed. Grant and his staff are a 10 out of 10.

Bill B.Red Feather Lakes

The office returned my calls promptly and we scheduled quickly. The technician showed up on time, completed a thorough examination and cleaning of my furnace, and emailed a written report for my records. Nice guy. Wonderful company.

Lynn Core

We have used Grant’s Heating and Air and have always been more than happy with their work. They are ethical and professional and know what they are doing. We wouldn’t use anyone else.

Bill and Jana Borland

Their technician fixed our furnace on a very cold day with no delay. They came right away, treating it as an emergency because we have small children and there was no heat. I also appreciate their honesty and the true cost of repairs.

Emergency no-heat (family with small children)

We had Grant’s HVAC install a multi-zone mini-split. From the initial assessment to completion we were impressed with the professionalism and workmanship. We could not be happier.

Mark and Leslie BlaulFort Collins, CO

We replaced our LP gas heating with a dual-fuel heat pump from Grant’s. Grant and his technicians were fantastic to work with — knowledgeable, good communicators, and they answered every question. We love the new system and its efficiency.

Carol Champion

We first used Grant nine years ago after buying our home in Crystal Lakes. They kept our old furnace going for years with fair-priced repairs. When it finally died, his team responded as an emergency. Honest and reliable. We will always use Grant’s.

Ron and Nancy KernCrystal Lakes

He replaced my hot water heater. Responded quickly, knew the installation, and I never felt like he was trying to oversell me — even though replacing the unit was expensive. Within two days of my first call I could take a hot shower. Support this local businessman.

Nichole Madden

I have been using Grant’s Heating and Air for years and have never been less than 100% satisfied. Dependable, honest, trustworthy, reasonably priced. I wouldn’t consider using anyone else.

Ray H.

5-star recommendation. Grant is knowledgeable, honest, fair priced, prompt, and very helpful. After a power outage he came right over to get our furnace restarting and made sure we’d know how to handle it next time. He even made a special trip to our daughter’s house. Grant cares about his customers.

David and Karen Young

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