“I have had Grant here twice now to work on our very complicated system. Both times he (and his staff) have…”
Read full review on GoogleJeff Struck — 8/16/2026
Mon–Fri 7:30 am – 5:30 pm · Sat–Sun by appointment · emergency calls answered
(970) 493-0866Reviews
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.

Grants Heating & Air
Nextdoor Neighborhood Fave · 5 years running“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
“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.”
Prefer Google? See all Google reviews · Nextdoor · Leave a review.