Sensible Heating and Cooling
“Luckily, they were able to come out same day right before the holidays to save the day and help where the other company just gave us a ridiculously high priced estimate to replace our system.”
Best HVAC Contractors in Littleton, CO
24 companies listed · 23 in Littleton · 9 open 24/7 · 16 open weekends · 21 rated 4.5+
Data verified October 27, 2026
Aim High Hvac
“Much to my satisfaction, Andy scheduled me in that day for an assessment and David arrived to confirm that the said Tankless Water Heater was in fact no longer capable of generating our 'Taken-for-Granted' hot water.”
ROX Heating & Air
“Kelly is absolutely amazing with scheduling, and Garrison and Calum were friendly, and efficient at tuning up our a/c and answering a couple questions about our whole home humidifier while they were here.”
Priority Plumbing and Heating
“Thank you Josh Knapp for your amazing professionalism, kindness and patience with each of us and for being so respectful of our home as you helped to fix our problem.”
Rock Plumbing
“Great customer service and awesome first time experience from scheduling the appointment same day to fix our broken AC and excellent 10/10 knowledgeable service from our technician Todd.”
Elkhorn Heating & Air Conditioning
“In spite of the need to confirm the outdoor pad installation with our HOA they continued their work and completed it on time and at the agreed upon price.”
The 24 companies listed for Littleton, 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: Littleton, CO
Of the 24 companies we list here, 23 are in Littleton itself and 1 comes from Englewood (4 mi). The companies on this page are rated from 4.4 to 5.0 across 8,470 reviews; 17 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 (80%) and responsiveness (80%). The topics that come up most in reviews of the companies on this page are "price", "cleanliness" and "estimates". 9 are open around the clock; 16 are open on Saturdays and 10 on Sundays. The services the companies on this page list most often on their websites are air quality (2), duct cleaning (2), indoor air quality (2) and water heaters (2). 6 show a license on their websites; 5 list staff certifications (NATE and EPA) and 10 have a BBB rating of A or A+. 14 have ten or more years of experience, the longest 49 years. 9 offer emergency call-outs; 13 offer financing or payment plans; 5 give free estimates; 6 are family- or locally-owned and 9 list coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Why do some of these firms show another city?
23 of the 24 companies are based in Littleton; the others come from other towns within 30 mi. This trade drives to you, so a shop over the county line is normal. Ask whether your address carries a travel charge.
Littleton Heating and Air Conditioning
“After moving from my house to a new condo my ac unit at the new condo was not working right and it was under warranty the company that installed the ac unit sent out 3 different teams at 3 different times to fix the ac unit, they did not succeed, whe...”
PS Cool Heat
“I initially reached out on a Monday morning and the entire project was complete on Wednesday afternoon, including his team walking me through how to use my Nest to control my April Aire 800.”
Emporia Home Services
“The problem was a little too complex to solve in one go, but he was very thorough in diagnosing the problem as well as making sure i was understanding everything that was going on.”
Simply Mechanical
“A lot of the other company's were up selling the latest and greatest tech which would have considerable more maintenance and not be fully utilized with my hydronic heating system, and cost a lot more money.”
Southwest Heating & Air Conditioning Repair
“They walked me through everything that needed to be done, put towels down to protect my floors, walked me through the new furnace and the upgrades they made, and made sure all my questions were answered.”
Golden Way Mechanical Inc
“I've had the pleasure of doing business with Golden Way for both residential and business needs, they've delivered great service each and every time.”
A Safe Home GAS Fireplace Service
“I had an issue today and they literally showed up PRECISELY at the minute of my appointment and because they'd been out before to work on my fireplaces they didn't charge for the visit even though they weren't at fault for the problem.”
Summit Heating A/C Plumbing & Electric
“Since my review, we've had excellent experiences with the Vincent/Frank team who did a very comprehensive test of our system, found some issues, and Summit completely took care of fixing everything for us.”
Quality Home Hvac
“3 installers arrived on the scheduled day and time, communicated clearly with me, did their work, cleaned up, went over the details with me, asked if I had any questions and told me how to reach them if any questions came up later.”
Blue Spruce Heating and Cooling
“Blue Spruce technician “Adam” took the time to listen to me as I explained I had personally replaced a part several years ago and the furnace was acting in the same way.”
Great Guys Heating
“Great Guys technician James Fowler did a thorough job of checking out and cleaning my air conditioner for the upcoming season and came back to improve drainage issues to get the system to peak performance.”
Fireside Heating & Cooling LLC
“Gave useful advice on how the dryer vented and could be cleaned by the homeowner (only a limited amount without proper tools) and how often it would need attention.”
Mac's Maintenance
“They even noticed some screws in the dryer vent line (after work was done by someone else related to a basement remodel) and made the necessary changes to correct the issue and bring it up to code.”
Duke's Heating and Cooling
“He made sure I was comfortable with every step, including the price, and also provided great tips on how to maintain the system, given some specific aspects of the model and initial installation.”
All American Heating
“John diagnosed the problem, proposed options to fixing the issue and even went onto explain how to perform periodic maintenance of our hot water heater system.”
Pace & Sons Mechanical
“He went above and beyond to contact Blue Ribbon warranty several times when they initially said they weren't going to cover the replacement and was able to get us coverage in the end.”
Sentry Heating & Cooling
“Assessed problem quickly, repaired fast!”
D&L Heating & A/C Inc
“I had Luke come out earlier this year to service our HVAC during the summer months and not only did he make it more comfortable in the house he also gave us some easy to do's as it gets cooler out to make the house more efficient this coming winter a...”
Why these companies made our list
What customers say about companies in Littleton
- “I highly recommend PS Cool Heat! They were very responsive, provided excellent customer service and repaired our furnace quickly with no issues.” — customer of PS Cool Heat
- “Timely, responsive, and professional job by Curtis to repair our high efficiency furnace.” — customer of Quality Home Hvac
- “Chris was very professional and neat. He explained in detail about my furnace and air conditioner.” — customer of Southwest Heating & Air Conditioning Repair
- “Damien was efficient and knowledgeable. He cleaned up after moving the thermostat.” — customer of Aim High Hvac
- “Derrick was knowledgeable and patient. He carefully explained our options and seemed very concerned that we understood the pros and cons of our various choices.” — customer of Littleton Heating and Air Conditioning
Excerpts from public reviews of the companies listed on this page.
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