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TRUSTED BY LONGMONT, CO HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon541
    Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Longmont, CO

*The Angi rating for Heating And Air Conditioning Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on July 06, 2026

Top-Rated Heating and air conditioning pros in Longmont - Updated Nov 2026

Avatar for M & H Air, LLC
M & H Air, LLC
5.0(
18
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallCentral A/C - Service or Repair+14 more

Serving Longmont, CO and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"I had an excellent experience with this HVAC company. Their team was highly professional, knowledgeable, and focused from start to finish. They took the time to explain everything clearly, completed the work efficiently, and demonstrated great attention to detail. It’s refreshing to work with a company that values quality, expertise, and customer service. I highly recommend them to anyone looking for reliable HVAC professionals."
M & H Air, LLC
Victory Outreach Church
1 neighbors recently requested a quote
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Avatar for Absolute 1st Choice Heating & Air Conditioning Inc.
Absolute 1st Choice Heating & Air Conditioning Inc.
4.5(
122
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairCentral Air Cleaner - Repair or Service+10 more

Serving Longmont, CO and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Dale is professional a always gets the job done. He has replaced two HVAC systems in our home and we can always count on him to do great work!"
Response time8 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Behold Heating & Cooling Services
Behold Heating & Cooling Services
4.9(
47
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairThermostat - Repair or Reprogram+2 more

Serving Longmont, CO and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Top tier heating and cooling hvac contractor! If youâ re in the Denver area you definitely want to utilize their services."
Boiler Repair/Replacement
Boiler Replacement and Repipe
Boiler Replacement and Repipe
Furnace, AC, Water Heater Replacement
Furnace Tune-up

+35

Response time6 hrs
Response rate100%
80 neighbors recently requested a quote
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Avatar for HighPoint HVAC
HighPoint HVAC
5.0(
24
)
Air Ducts & Vents - Clean

Serving Longmont, 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"
2 neighbors recently requested a quote
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Avatar for One Hour Heating & Air Conditioning - Loveland
One Hour Heating & Air Conditioning - Loveland
4.7(
208
)
Air Ducts & Vents - Clean

Serving Longmont, 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."
4 neighbors recently requested a quote
Recommended by92%of homeowners
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Avatar for 1st Action Plumbing Heating and Air, Inc.
1st Action Plumbing Heating and Air, Inc.
4.6(
153
)
Ductless Mini-split Heating System - Install or ReplaceDuctless Mini-split A/C - Install or ReplaceElectric Furnace / Forced Air Heating System - Install+7 more

Serving Longmont, CO and surrounding areas

Approved

In business since 2017

Free estimates

Small jobs welcome

"Provided excellent advice regarding the installation of an electric water heater. Personable, knowledgeable, and professional. Have hired them to perform regular maintenance on HVAC and water heater."
Navien Tankless
Lennox EL296V
Response time5 hrs
6 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for Heart Heating, Cooling, Plumbing & Electric
Heart Heating, Cooling, Plumbing & Electric
4.7(
92
)
Gas Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceCentral A/C - Install+17 more

Serving Longmont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Ben and Daniel from the Denver branch were excellent to work with. I highly recommend them for HVAC/HWH maintenance!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+24

10 neighbors recently requested a quote
Recommended by81%of homeowners
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A-Moonlight Heating & Air Conditioning
5.0(
52
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - Repair

Serving Longmont, CO and surrounding areas

Approved

In business since 2014

Emergency services offered

Warranties offered

"Brent is extremely knowledgeable, hard working and dedicated to finding a solution. He worked for hours diagnosing the issue with my HVAC before finally finding the issue, and only charged me for the work done in fixing the issue. He's the only guy I'll be calling for HVAC maintenance and repair going forward"
Response time3 hrs
2 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for AAA Service Plumbing, Heating & Electric - H
AAA Service Plumbing, Heating & Electric - H
4.4(
466
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Longmont, CO and surrounding areas

Approved

In business since 1983

Free estimates

Credit card accepted

"Jamie H. was prompt, courteous, professional and knowledgeable!! I highly recommend requesting him when contacting AAA Service Plumbing, Heating & Electric for your HVAC needs!"
My jobs
My jobs
My jobs
My jobs
Recommended by94%of homeowners
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Avatar for D&D Air Duct Pros
D&D Air Duct Pros
5.0(
18
)
Air Ducts & Vents - Clean

Serving Longmont, CO and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

Our company uses the most advanced AIR DUCT CLEANING systems available. It is designed and manufactured by NIKRO industries. We use only HEPA provided machines. We meet or exceed OSHA, EPA, NADCA and guarantee all our work. We are the allergy busters.

Aftet
Save
After
Air Ducts
After

+35

2 neighbors recently requested a quote
Recommended by44%of homeowners
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Showing 1-10 of 625
Heating and Air Conditioning FAQs, answered by experts

Yes, a frozen AC unit can affect your indoor air quality since the reduced airflow won't be as effective at removing air pollutants, like dust and other allergens. Additionally, ice around the unit can create excess moisture, leading to mold and mildew that can damage your home if you don’t catch it early.

HVAC companies may charge an hourly rate or a flat fee. Hourly rates typically range from $100 to $250 per hour, with an average around $175. Some contractors charge a flat fee for specific services, such as an inspection, which can cost between $150 and $500. The total cost of an HVAC service is influenced by several factors, including: the urgency of the service (emergency repairs after hours or on holidays cost more), the time of year, the type, size, and brand of your HVAC system, the specific repair needed, and whether you have a service contract.

Yes, but they don’t feel the same as an AC-cooled room. You’ll feel cool, moist air, opposite from an HVAC system that dries the air as it cools. Ventless units also have less tonnage than alternatives like ductless and central air, which means they aren’t as capable of quickly cooling large spaces or circulating cold air.

Most HVAC companies charge a flat service call fee of between $75 and $150, which includes traveling to your home and inspecting your system to find the underlying problem. Keep in mind that these prices only include diagnostics and the actual repairs will usually be billed separately. If you’re calling for routine service, the service call will be included in your inspection and tune-up, with the total sitting around $150. Your prices could be a little higher if you have a very large home with multiple condensers and air handlers, as inspections and servicing take longer.

If you’re planning an AC replacement, choosing an AC with a higher SEER rating may save you money in the long run. Tax credits could cover as much as 30% of the job, and you’ll notice smaller utility bills (particularly if you live in a hot climate where you need to constantly run the AC). Generally, you can expect to pay between $350 and $1,500 for each SEER rating increase. Weigh the cost against your typical utility bill to figure out what’s worth it to you.

The Longmont, 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.

See all articles