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4.5

(450 reviews)

Top-rated heating and air conditioning pros.

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Avatar for One Hour Heating & Air Conditioning - Loveland
One Hour Heating & Air Conditioning - Loveland
4.7(
207
)

Serving Boulder, CO and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1978

Free estimates

Emergency services offered

"Brian, the HVAC technician was professional, friendly and extremely knowledgeable, he provided a full estimate before starting the work and then performed the repair immediately. We were back up and running in minutes. Well Done 1 hr team."
61 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Mountain Pro HVAC Services, LLC
Mountain Pro HVAC Services, LLC
5.0(
126
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Adrian was tremendous! He took on a tough project, never gave up and solved my HVAC problem. Patient, thoughtful, collaborative with pricing. Recommend him without reservation."
Maintenance Services
Maintenance Services
Maintenance Services
Maintenance Services
New AC / Furnace Install

+4

Response time11 hrs
Response rate92%
1 neighbors recently requested a quote
Avatar for HighPoint HVAC
HighPoint HVAC
5.0(
19
)

Serving Boulder, CO and surrounding areas

Approved

Credit card accepted

"had such a great experience with HighPoint HVAC! The entire process was seamless and incredibly easy from start to finish. I was able to schedule an appointment right away, and the team arrived exactly on time. They were professional, friendly, and took the time to explain everything clearly. After finishing the job, they left the space spotless; you’d never know any work had been done. Their quality of service and attention to detail really stood out, and the pricing was very fair. I’d highly recommend this company to anyone looking for reliable, high-quality HVAC service"
3 neighbors recently requested a quote
Avatar for Pacific Air, Inc.
Pacific Air, Inc.
4.8(
84
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Offers commercial services

"They did a great job installing a new thermostat & water heater at my house. The tech Ray was great to work with and I will be calling them with any further HVAC needs."
New inside set up
New Outside set up
Before inside set up
Before outside set up
Response time4 hrs
Response rate94%
5 neighbors recently requested a quote
A-Moonlight Heating & Air Conditioning
5.0(
52
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2014

Emergency services offered

Warranties offered

"A-Moonlight provided timely and professional service. They were able to diagnose issues with my A/C and furnace quickly and explained the issue and their proposed solutions. Brent made me aware of my options for repair and what services were necessary and what was not. They were able to install the parts I purchased and service my furnace and A/C within a few hours. They got everything working in one trip and charged about 1/6th of what a competitor was asking. I would highly recommend A-Moonlight for any residential HVAC needs and I will be hiring them in the future should I need any other HVAC services."
Response time3 hrs
8 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for AT Mechanical LLC
AT Mechanical LLC
5.0(
10
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"I called AT Mechanical to service my air conditioner. And I've got to say, it's like new! My AC used to not be able to keep up with the temp in the house. Now it easily does! Please give them a call if your AC isn't keeping up on hot days! I highly recommend using them to service your AC or furnace."
AT Mechanical LLC
AT Mechanical
AT Mechanical
AT Mechanical
AT Mechanical

+3

11 neighbors recently requested a quote
Avatar for Your Comfort Heating and Cooling
Your Comfort Heating and Cooling
5.0(
19
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"We had two AC units and a new furnace installed they were prompt, efficient, very respectful and great customer service! Dean was an absolute pleasure to work with, they have earned my business for life on any HvAC services I might need! Highly recommend"
New Amana Furnace
New Amana Heat Pump
High Efficiency
Outside Condensers
two new condensers

+3

Response time40 mins
Response rate92%
22 neighbors recently requested a quote
Avatar for Steven & Sons Heating and Cooling
Steven & Sons Heating and Cooling
4.8(
116
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2015

Emergency services offered

Warranties offered

"Steven and Mario were hands down the best guys for the job. Very Professional and knowledgeable about what they are doing. I am going to recommend them to anyone I know that needs hvac work done.. It was a pleasure to have met them and will continue to use Steven and sons in the future 10/10!!"
Steven Brazing one of our larger projects
Brazing
Mariano Brazing
Furnace Loaded and ready for delivery
Cutting

+47

Response time4 hrs
Response rate92%
7 neighbors recently requested a quote
Avatar for Limelight Services LLC
Limelight Services LLC
4.7(
19
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Limelight does an amazing job. They installed all the electrical in our building. They were efficient, detailed, alert to our needs, and did an overall awesome job. When it comes to electrical, HVAC, or plumbing I can trust these guys. They stand behind their work & are friendly and easy to deal with. Highly recommended!"
Safety first!  Only hire companies that look out for the safety of their workforce!
We love seeing a new furnace installed, it means years of comfort and reliability to come!
LED tape inside and under cabinets
We own our excavation equipment, so we can be there for repairs, same day!  There is no time to waste when the waste won't flow.
Check out this beautiful spring view from a customer's home in SW Boulder, CO.  We will take care of everything you need inside and outside of your house, plumbing, HVAC, or electrical related!

+38

Response time1 day
28 neighbors recently requested a quote
Recommended by82%of homeowners
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Heating and Air Conditioning questions, answered by experts

If both your furnace and AC unit are more than a decade old, it may be a good idea to replace both of them. However, your furnace can last up to three decades, and your air conditioner can typically last up to 15 years, so consulting with a pro before deciding to replace both of them is best. If it’s before that time limit for each, you can fix many problems with repairs or just replace one.

Yes. It's not just AC filters that get dirty. Ducts can accumulate dust and dirt quickly. Insects and animals can also get into duct systems, creating many problems. Dirt build-up and unwanted guests can constrict the airflow and cause rooms not to cool evenly. You might also see higher energy bills because they're not working as efficiently.

A non-maintained AC is more likely to perform poorly, increase your energy bills, and undergo more severe issues like breakage and water damage. That’s why DIY cleaning or professional maintenance is recommended annually. Otherwise, you might end up paying more in the end than you would for annual service. You can purchase cheap AC cleaning kits if you prefer going the DIY route.

A dirty air conditioning coil can cause your unit to work overtime, leading to reduced efficiency, higher energy use, more wear and tear, and possible ice buildup. If the coils corrode, refrigerant can leak, causing damage, possible mold growth, and an expensive repair bill. By cleaning your AC coils once a year, you’ll have a more efficient unit that’s likely to last longer.

Most HVAC companies recommend against setting your AC below 70 as it could freeze up the system and cause more problems. Regardless of how hot it is outside, there is generally a 20 degree difference between the outside and inside temperatures, so even if it’s 100 degrees outside, your AC will likely not be able to cool your home to 70 degrees.

The Boulder, CO homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.