25 Best HVAC Contractors in Denver for 2026

❄️ 25 businesses · 📍 Denver, CO
✓ Verified Google reviews · ✓ Reviewed regularly · ✓ Updated May 29, 2026
Mark Reid
Written by Mark Reid, Home Services Editor · Verified May 29, 2026
Denver's climate is genuinely demanding on HVAC systems. You're dealing with temperatures that swing from well below freezing in January to the low 90s in summer, plus the Front Range's notorious dry air and occasional wildfire smoke events that put real strain on air filtration equipment. Most of the city's housing stock runs the gamut from 1950s ranch-style homes in Wheat Ridge and Arvada to newer construction in Stapleton and Highlands Ranch, and the heating and cooling needs differ significantly between them. Older homes often have aging forced-air furnaces, undersized ductwork, or swamp coolers that need converting to refrigerant-based AC. Newer builds tend to come with high-efficiency systems that need specialized technicians who know how to service variable-speed compressors and smart thermostats. The altitude matters too: Denver sits at 5,280 feet, and combustion equipment like gas furnaces needs to be properly calibrated for the thinner air or it'll run inefficiently and wear out faster.

The businesses listed on this page were drawn from third-party public business listings and ranked by public review rating alongside review count, so a contractor with dozens of verified reviews carries more weight than one with a handful. Businesses with a working website and a publicly listed phone number receive a small ranking lift, since those signals suggest an active operation. We check each business's homepage to confirm that HVAC work is what they primarily do, which keeps general handymen or unrelated trades from appearing here. Any listing flagged as permanently closed is removed automatically. Where you see a Trust Verified badge next to a business, that contractor has passed our full verification process covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. You can find the complete list of what that covers on our How We Verify page. Businesses without that badge have not been independently verified by us, and you should carry out your own checks before booking.

Before you call any HVAC contractor in Denver, ask whether they hold a valid Colorado State HVAC contractor license and request the license number so you can check it with the Colorado Department of Regulatory Agencies. For any job involving refrigerants, your technician should hold EPA 608 certification. Get at least three written quotes that break down parts, labor, and equipment separately so you're comparing like for like. Ask specifically about equipment brands and efficiency ratings, since a $4,500 furnace install might use a 80% AFUE unit while another quote at $5,800 includes a 96% AFUE model that cuts your gas bill noticeably over time. Check that any permit required by Denver Building Inspections will be pulled by the contractor, not left to you. And confirm the warranty terms in writing: most quality installs carry a manufacturer's equipment warranty plus a separate labor warranty from the contractor, and you want both spelled out before any work starts.
How We Select & Rate The Best HVAC Contractors in Denver, CO

Rankings on this page are driven by public review rating and review count pulled from third-party business listings, with a small additional lift for contractors that have a working website and a publicly listed phone number. We check each business's homepage to confirm that HVAC contracting is what they primarily offer, which keeps unrelated trades off the page. Permanently-closed listings are removed automatically. Businesses displaying a Trust Verified badge have additionally passed our full verification covering qualifications, insurance, trading history, customer review history, and registered company information. See our How We Verify page for the complete criteria. All other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always do your own checks before hiring.

Positions 1–5 (Recommended and Featured) may be paid placements. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →

Quick Comparison — HVAC Contractors in Denver, CO

# Business Rating Reviews Phone
1 Applewood Plumbing Heating & Electric Recommended ⭐ 4.8 17,102 (303) 444-1633 View →
2 Absolute Plumbing, Electrical, Heating & Air Featured ⭐ 4.9 3,760 (720) 954-2939 View →
3 Heart Heating, Cooling, Plumbing & Electric Featured ⭐ 4.8 3,026 (720) 712-0649 View →
4 The Weather Changers Heating and Air Conditioning Featured ⭐ 5.0 1,286 (303) 340-0077 View →
5 Ultimate Heating, Cooling, Plumbing & Electric Featured ⭐ 4.8 1,240 (720) 306-9245 View →
6 Steel T | Denver HVAC ⭐ 4.8 931 (303) 761-9276 View →
7 Salzano Services ⭐ 5.0 373 (303) 276-1495 View →
8 Motili ⭐ 4.7 775 (800) 669-9656 View →
9 Roots Heating & Air ⭐ 5.0 280 (303) 381-3061 View →
10 Gustafson Heating & Air Conditioning Inc. ⭐ 5.0 267 (303) 922-6289 View →
11 Right Away Heating ⭐ 4.9 318 (720) 646-1962 View →
12 Time Plumbing, Heating & Electric Denver ⭐ 4.6 778 (303) 758-6237 View →
13 Action Air Duct Cleaning Denver ⭐ 4.9 256 (720) 257-3319 View →
14 Veteran Heating, Cooling, Plumbing & Electric ⭐ 4.9 233 (720) 594-6631 View →
15 UniColorado Heating & Cooling ⭐ 5.0 143 (303) 997-0097 View →
16 Comfy Castle Heating and Air ⭐ 5.0 129 (303) 227-9999 View →
17 Sure Fire HVAC Denver ⭐ 5.0 87 (303) 917-5339 View →
18 A Family Friend HVAC ⭐ 5.0 71 (720) 515-5885 View →
19 Precision Climate HVAC Service ⭐ 4.9 97 (720) 664-8310 View →
20 75 Degree Heating & Air ⭐ 5.0 68 (619) 333-7575 View →
21 Brown Brothers Plumbing and HVAC ⭐ 4.9 94 (720) 790-7371 View →
22 Day & Night Mechanical Solutions, Inc. ⭐ 4.6 244 (303) 936-2696 View →
23 Steven & Sons Plumbing & HVAC ⭐ 4.9 91 (720) 730-9741 View →
24 Upslope Heating and Cooling ⭐ 4.8 126 (720) 421-7159 View →
25 Champs Heating & Air Conditioning ⭐ 5.0 62 (303) 847-8741 View →

Our Top Picks

6
Steel T | Denver HVAC
Not Verified
4.8 (931 reviews)
Denver, CO (303) 761-9276

Steel T | Denver HVAC provides comprehensive heating, ventilation, and air conditioning services throughout the Denver area from their Englewood location. The company maintains a strong reputation with a 4.8/5 star rating from 931 verified customer reviews. Their experienced technicians handle installation, repair, and maintenance services for residential and commercial HVAC systems.

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7
Salzano Services
Not Verified
5.0 (373 reviews)
Denver, CO (303) 276-1495

Salzano Electric provides professional electrical services to Denver residents and businesses from their downtown location on Stout Street. The company has earned a perfect 5-star rating from 378 verified Google reviews, reflecting their commitment to quality workmanship and customer satisfaction. Their licensed electricians handle residential and commercial electrical installations, repairs, and maintenance throughout the Denver area.

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8
Motili
Not Verified
4.7 (775 reviews)
Denver, CO (800) 669-9656

Motili provides comprehensive HVAC services throughout the Denver area, operating from their downtown location on Wazee Street. The company maintains a strong reputation with customers, earning 4.7 out of 5 stars from 775 verified Google reviews. Their experienced technicians handle heating, ventilation, and air conditioning installations, repairs, and maintenance for residential and commercial properties in the 80202 area and surrounding neighborhoods.

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9
Roots Heating & Air
Not Verified
5.0 (280 reviews)
Denver, CO (303) 381-3061

Roots Heating & Air provides comprehensive HVAC services including heating and cooling system installation, repair, and maintenance for Denver area residents and businesses. Located on Santa Fe Drive, this locally-owned company has earned a perfect 5-star rating from 274 verified customer reviews. Their certified technicians handle everything from furnace repairs and air conditioner tune-ups to complete system replacements throughout the Denver metro area.

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10
Gustafson Heating & Air Conditioning Inc.
Not Verified
5.0 (267 reviews)
Denver, CO (303) 922-6289

Gustafson Heating & Air Conditioning Inc. provides comprehensive HVAC services to Denver area residents from their Englewood location. The company specializes in heating and cooling system installation, repair, and maintenance for residential and commercial properties. With a perfect 5-star rating from 267 verified customer reviews, they have built a strong reputation for reliable service in the greater Denver metro area.

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11
Right Away Heating
Not Verified
4.9 (318 reviews)
Denver, CO (720) 646-1962

Right Away Heating provides comprehensive HVAC services to Denver residents and businesses from their Santa Fe Drive location in the 80223 area. The company handles heating system installations, repairs, and maintenance for both residential and commercial properties. With a 4.9-star rating from 318 verified customer reviews, they have built a strong reputation for reliable service throughout the Denver metro area.

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12
Time Plumbing, Heating & Electric Denver
Not Verified
4.6 (778 reviews)
Denver, CO (303) 758-6237

Time Plumbing, Heating & Electric Denver provides comprehensive HVAC services including heating system installation, repair, and maintenance for residential and commercial properties throughout the Denver area. Located on W 6th Ave, the company has earned a solid reputation with a 4.6-star rating from 778 verified customer reviews. Their experienced technicians handle everything from furnace repairs to complete heating system replacements, serving customers across the 80204 area and surrounding Denver neighborhoods.

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13
Action Air Duct Cleaning Denver
Not Verified
4.9 (256 reviews)
Denver, CO (720) 257-3319

Action Air Duct Cleaning Denver provides professional HVAC air duct cleaning services throughout the Denver area from their Fillmore Street location. The company maintains a 4.9/5 star rating based on 256 verified customer reviews, reflecting their commitment to thorough duct cleaning and improved indoor air quality. They serve residential and commercial clients in the 80206 area and surrounding Denver neighborhoods.

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14
Veteran Heating, Cooling, Plumbing & Electric
Not Verified
4.9 (233 reviews)
Denver, CO (720) 594-6631

Veteran Heating, Cooling, Plumbing & Electric provides comprehensive HVAC, plumbing, and electrical services to Denver residents and businesses from their Brighton Boulevard location. The company maintains a 4.9-star rating from 233 verified customer reviews, reflecting their commitment to quality workmanship and reliable service. Their experienced technicians handle everything from routine maintenance and repairs to complete system installations across the Denver area.

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15
UniColorado Heating & Cooling
Not Verified
5.0 (143 reviews)
Denver, CO (303) 997-0097

UniColorado Heating & Cooling provides comprehensive HVAC services to Denver residents and businesses from their location on W Evans Ave. The company maintains a perfect 5-star rating based on 143 verified customer reviews, reflecting their consistent service quality throughout the Denver area. Their team handles heating and cooling system installations, repairs, and maintenance for both residential and commercial properties.

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16
Comfy Castle Heating and Air
Not Verified
5.0 (129 reviews)
Denver, CO (303) 227-9999

Comfy Castle Heating and Air provides comprehensive HVAC services throughout the Denver area, including installation, repair, and maintenance of heating and cooling systems. The company has earned a perfect 5-star rating from 128 verified customer reviews, reflecting their commitment to reliable service and customer satisfaction. Their experienced technicians handle everything from routine tune-ups to complete system replacements for residential and commercial properties.

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17
Sure Fire HVAC Denver
Not Verified
5.0 (87 reviews)
Denver, CO (303) 917-5339

Sure Fire HVAC Denver provides comprehensive heating, ventilation, and air conditioning services throughout the Denver area. The company handles installations, repairs, and maintenance for both residential and commercial HVAC systems. With a perfect 5-star rating from 87 verified customer reviews, Sure Fire HVAC Denver has built a strong reputation for reliable service in the local community.

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18
A Family Friend HVAC
Not Verified
5.0 (71 reviews)
Denver, CO (720) 515-5885

A Family Friend HVAC provides heating, ventilation, and air conditioning services to Denver area homeowners and businesses. The contractor maintains a perfect 5-star rating based on 71 verified customer reviews, reflecting their commitment to quality workmanship and reliable service. They handle installation, repair, and maintenance of HVAC systems to keep properties comfortable year-round.

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19
Precision Climate HVAC Service
Not Verified
4.9 (97 reviews)
Denver, CO (720) 664-8310

Precision Climate HVAC Service provides heating, ventilation, and air conditioning services to Denver residents and businesses from their location on E Colfax Ave. The company maintains a 4.9/5 star rating based on 97 verified customer reviews, reflecting their consistent service quality. They serve the Denver area with comprehensive HVAC installation, repair, and maintenance solutions.

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20
75 Degree Heating & Air
Not Verified
5.0 (68 reviews)
Denver, CO (619) 333-7575

75 Degree Heating & Air provides comprehensive HVAC services throughout Denver, specializing in heating and cooling system installation, repair, and maintenance for residential and commercial properties. The company has earned a perfect 5-star rating from 68 verified customer reviews, reflecting their commitment to reliable service and customer satisfaction. Located in the 80202 area, they serve the greater Denver community with professional climate control solutions.

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21
Brown Brothers Plumbing and HVAC
Not Verified
4.9 (94 reviews)
Denver, CO (720) 790-7371

Brown Brothers Plumbing and HVAC provides comprehensive heating, ventilation, and air conditioning services to Denver residents and businesses from their Broadway location. The company has earned a strong reputation with a 4.9-star rating from 94 verified customer reviews. Their experienced technicians handle installation, repair, and maintenance of HVAC systems throughout the Denver area.

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22
Day & Night Mechanical Solutions, Inc.
Not Verified
4.6 (244 reviews)
Denver, CO (303) 936-2696

Day & Night Mechanical Solutions, Inc. provides comprehensive HVAC services throughout Denver, specializing in heating, cooling, and ventilation system installation, repair, and maintenance. Operating from their West Alameda Avenue location, this contractor has earned a solid 4.6-star rating from 244 verified customer reviews. The company serves residential and commercial clients across the Denver metro area with reliable heating and air conditioning solutions.

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23
Steven & Sons Plumbing & HVAC
Not Verified
4.9 (91 reviews)
Denver, CO (720) 730-9741

Steven & Sons Plumbing & HVAC provides comprehensive heating, ventilation, and air conditioning services to Denver residents and businesses from their Corona Street location. The company maintains an exceptional 4.9-star rating based on 91 verified customer reviews, reflecting their commitment to quality workmanship and reliable service. They serve the greater Denver area with professional HVAC installation, repair, and maintenance solutions.

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24
Upslope Heating and Cooling
Not Verified
4.8 (126 reviews)
Denver, CO (720) 421-7159

Upslope Heating and Cooling provides residential and commercial HVAC services throughout the Denver area, including heating system installation, air conditioning repair, and routine maintenance. The company has earned a 4.8-star rating from 126 verified customer reviews, reflecting their commitment to reliable service and customer satisfaction. Their experienced technicians handle everything from emergency repairs to complete system replacements for Denver-area homes and businesses.

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25
Champs Heating & Air Conditioning
Not Verified
5.0 (62 reviews)
Denver, CO (303) 847-8741

Champs Heating & Air Conditioning provides comprehensive HVAC services including heating system installation, air conditioning repair, and maintenance throughout the Denver area. The company has earned a perfect 5-star rating from 62 verified customer reviews, reflecting their commitment to reliable service and customer satisfaction. Their experienced technicians handle both residential and commercial heating and cooling needs for Denver-area property owners.

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Transparency notice: Recommended (#1) and Featured (positions 2-5) listings may be paid placements, so a business's fee affects whether and where it appears in those positions. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →

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Frequently Asked Questions

How much does a HVAC contractor cost in Denver?
HVAC service calls typically range from $85-$150, while furnace tune-ups cost $120-$200. Furnace replacement runs $3,500-$8,000 depending on efficiency ratings and ductwork modifications. Central air installation averages $4,000-$7,500 for most Denver homes. Duct cleaning costs $300-$600, and whole-house humidifiers run $400-$800 installed. Getting quotes from two or three contractors helps you understand fair pricing for your specific situation.
Do HVAC systems work differently at Denver's altitude?
Yes, the thin air at 5,280 feet affects gas furnace combustion and requires proper adjustment of air-to-fuel ratios. Many contractors need to install high-altitude conversion kits or adjust gas valve settings for optimal efficiency. Air conditioning units also work harder in the dry climate and intense UV exposure. Make sure your contractor has experience with altitude-specific adjustments and uses appropriately rated equipment.
What HVAC maintenance does Denver's climate require?
Change furnace filters every 1-2 months during heating season due to dust from frequent wind. Clean evaporative cooler pads monthly if you have swamp cooling. Schedule furnace tune-ups before October and AC service before June. The dry climate means humidifier maintenance is crucial - clean the pad monthly and check water supply lines. UV exposure degrades outdoor unit components faster, so annual inspections catch problems early.
Should I get a heat pump or furnace in Denver?
Gas furnaces remain the most reliable choice for Denver's cold winters, especially in older homes with existing gas lines. Modern cold-climate heat pumps work down to -10°F but may need backup heating during extreme cold snaps. Heat pumps make sense in newer, well-insulated homes or if you're adding cooling simultaneously. Your contractor should calculate heat loss and compare operating costs based on current gas and electric rates.
How long do HVAC systems last in Denver's climate?
Gas furnaces typically last 15-20 years with proper maintenance, while the intense UV and temperature swings can shorten air conditioner lifespan to 12-15 years. High-efficiency units often have more complex components that may need service sooner. Evaporative coolers last 8-12 years but require more frequent pad and pump replacements. Regular maintenance and prompt repairs extend system life significantly in this demanding climate.
How do I verify an HVAC contractor's credentials in Colorado?
Check their contractor license through the Colorado Department of Regulatory Agencies website using their license number. Verify liability insurance by asking for a certificate from their insurance company. Confirm they're certified to handle refrigerants through EPA 608 certification. Check Better Business Bureau ratings and ask for recent local references. Make sure they pull proper permits for gas line work and major installations through your city's building department.