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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

No, you should not attempt to replace an AC evaporator coil yourself. This is a complex task that must be performed by a licensed HVAC technician. The process involves handling hazardous and flammable refrigerants, which poses significant safety risks. Attempting a DIY replacement can also cause further damage to your HVAC system and will likely void its warranty. It is necessary to hire a local AC repair professional for this job.

At a minimum, an HVAC system should be serviced once per year. However, a twice-a-year service schedule—once in the spring for the cooling system and once in the fall for the heating system—is often recommended, especially for older systems, heat pumps, or in climates with extreme temperatures. Regular service, which includes inspection, cleaning, and maintenance, ensures the system runs efficiently, helps prevent costly breakdowns during peak seasons, and can extend the unit's lifespan. You can also schedule a service if you notice issues like poor performance or strange noises.

Set your house temperature between 55 and 85 degrees Fahrenheit while on vacation, depending on the season. If it’s winter, don’t go below 55 degrees. In the summer, the best AC temperature for energy savings is no higher than 85 degrees. You can save anywhere from 10% to 15% on your energy costs by adjusting the temperature while you’re away. If you have a smart thermostat, set up vacation modes for each season. On your way home, turn off vacation mode to allow the home to warm up or cool down before you arrive.

Replacing an HVAC system does not always include new ductwork. The decision depends on the condition of your existing ducts. If they are in good shape, correctly sized for the new unit, and meet current standards, they can often be reused. However, if the ducts are damaged, poorly designed, or improperly sized, they will likely need to be replaced or upgraded to ensure the new system operates efficiently. An HVAC contractor will assess your ductwork and recommend the best course of action. Typically, ductwork is purchased separately, and a full replacement will add to the overall project cost.

As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.

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.