Fort Collins Heating & Air Conditioning
“Shawn also listened carefully to some concerns I had regarding my HVAC system's intake/exhaust and came up with a couple great options from which I was able to make an informed choice.”
Best HVAC Contractors in Fort Collins, CO
24 companies listed · all 24 in Fort Collins · 11 open 24/7 · 17 open weekends · 21 rated 4.5+
Data verified October 26, 2026
Cool Ducts Heating and Cooling
“Nick came out and inspected the line and also couldn't identify the leak but he offered a simple solution of adding a UV dye to the refrigerant so the next time this happens we can spot it quickly.”
Oztek Commercial Services
“Zack helped me reach all the problems and was able to provide great service, super happy with the customer service and what a great standup guy Zack is!”
Lion Home Service
“Not only did they come in and provide the extensive services we needed, they also helped us reach out to a few other services that we needed to make sure everything was taken care of.”
Poudre Valley Air
“I was apprehensive by the prospect of replacing my furnace- and in February no less, but because of Steve who diagnosed the problem, and Andy who educated me on my options, and Steve, Damien, and Andrew who did the install, it really was a very easy ...”
Northern Colorado Air Inc
“We appreciate their good communication, honest pricing, long-term employees (nice to see the same faces over the years), and overall quality and timeliness of service.”
The 24 companies listed for Fort Collins, CO work on furnaces, heat pumps and air conditioners. Each profile repeats what the company publishes about its hours, its license and the equipment it fits, alongside ratings and quotes drawn from public reviews.
Area overview: Fort Collins, CO
All 24 companies we list here are in Fort Collins itself. We have 25 companies in Fort Collins on file; this page shows the highest-rated 24. The companies on this page are rated from 4.2 to 5.0 across 12,418 reviews; 10 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (91%), quality (87%) and responsiveness (81%). 11 are open around the clock; 17 are open on Saturdays and 15 on Sundays. The services the companies on this page list most often on their websites are indoor air quality (4), heating (3), air conditioning (2), boilers (2) and commercial refrigeration (2). 7 show a license on their websites; 3 list staff certifications (BPI, EPA and NATE) and 5 have a BBB rating of A or A+. 16 have ten or more years of experience, the longest 73 years. 11 offer emergency call-outs; 9 offer financing or payment plans; 11 give free estimates; 6 are family- or locally-owned and 12 list coupons or special offers. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Which companies listed for Fort Collins answer no-heat calls at night?
Round the clock availability appears in 11 of the 24 listings on this page. An overnight visit is usually a diagnosis and a temporary fix, since supply counters are shut until morning. Ask what the after hours call out is before the truck leaves.
Rex's Plumbing & Heating
“Not only did he fix a complex outdoor faucet issue but they also identified a couple other potentially catastrophic plumbing issues in our home, saving us money down the road.”
Specialized 72 Degrees Air Conditioning & Heating
“He came out and showed me the cracks in the heat exchanger and told me that whoever installed the furnace did it incorrectly because it was not elevated off the ground to allow air to flow.”
Bison Home Service
“Hayden did a great job taking out the time and talking and explaining steps to be done for our kitchen project, which still is in progress, however communication is a step they could do some improvement when steps fall behind and do not keep you info...”
Allen Service
“He was friendly and focused on finding the problem with our air conditioner, he located the problem, took the time to explain why there was a problem and the solution.”
Hooley Heating & Air Conditioning
“Everyone I dealt with from the owner to the office staff to the installer to the technician, Jake who came by the next day after install to check on the install and make minor adjustments, were very friendly and knowledgeable.”
Horsetooth Heating and Air
“There were some unexpected obstacles to overcome with my AC replacement and it was so impressive to work with a company that demonstrates such a high level of problem- solving, follow up and integrity.”
Noco Energy Solutions
“Quickly identified a failed pump on our hydronic system, ordered for next day and had the heat working before the 'big freeze' at the start of this year.”
This Efficient House
“He spent the time to come out to our most recent jobsite, walking through with my guys and educating us all about HVAC and framing details that will help us build better homes for our clients.”
Neuworks Mechanical
“From new construction to remodels and service projects, Neuworks Mechanical can do it all!”
Air Products Heating & Cooling
“We decided it was time to be proactive and replace the 20+ year old equipment that these guys had kept running since we moved in and they took good care of us.”
Certified Mechanical
“We had a problem this week with the compressor shutting off, and he came out two different times without charging to help diagnose the problem, then explained how to fix it cheaply ourselves.”
R & H Heating & Air Conditioning Inc
“) Everyone who has come out to work on the system has been punctual, very pleasant to work with, responsive to the (many) questions I always have, and, best of all, very knowledgeable and competent.”
Alpha Plumbing
“I've heard nothing but but good from friends about alfa but Jamie was able to get someone with experience and personality Jason was very intelligent about explaining plumbing issues”
Beier Heating and Air Conditioning
“I would highly recommend these guys to anyone who needs help with their HVAC system.”
2nd Heating & Air
“Also, we had an emergency thermostat issue at the rental just a couple of weeks ago and he went over to diagnose the problem and he installed a new one for us.”
American Services Co
“Great prices and recommend for commercial businesses exellente meat”
IMS Heating & Air Inc
“There were a few issues that were found and David explained everything - whether it was something to just keep an eye on, to actually replacing a part - he also offered several options with no pressure at all.”
Fort Collins Overhead Door Repair
“"Great experience from start to finish.”
Why these companies made our list
What customers say about companies in Fort Collins
- “Caleb was very knowledgeable and friendly, and he took the time to explain everything to me.” — customer of Bison Home Service
- “Extremely professional, quickly installed the new thermostat, and even showed me step by step how to set up the scheduling option on the new one.” — customer of Northern Colorado Air Inc
- “Excellent communication and great work. Our furnace died suddenly and Kyle and his team worked with us to quickly get a new unit installed.” — customer of Horsetooth Heating and Air
- “They are super knowledgeable, answer all of your questions, are prompt and do great work.” — customer of Air Products Heating & Cooling
- “Justin was quick to respond and fix my troubled furnace at a reasonable price.” — customer of Specialized 72 Degrees Air Conditioning & Heating
Excerpts from public reviews of the companies listed on this page.
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