Top HVAC Companies In Denver For 2027

Denver weather swings from 95 degree summer afternoons to below-zero January nights, sometimes within the same season. That puts heavy demand on both air conditioners and furnaces, and the altitude affects combustion and system sizing. A local HVAC company that understands Front Range conditions is worth the search.

The heating and cooling companies below are established Denver-area contractors handling repair, replacement and maintenance. Several also offer plumbing and electrical service.

Denver HVAC Companies At A Glance

Company	Base	Known For	Best For
Roots Heating and Air	Denver	24-hour heating and cooling	Emergency no-heat calls
UniColorado Heating and Cooling	Englewood, Denver	Residential heating and cooling	Homeowners comparing replacement quotes
SWAN Plumbing, Heating and Air of Denver	Denver, Littleton	Furnace and AC, plumbing	Budget-minded homeowners
Pasterkamp Heating and Air Conditioning	Denver	Heating repair, AC	Homeowners who value long track records
ARS Rescue Rooter Colorado	Denver metro to Loveland	Repairs on all major brands	Wide service area
Brothers Plumbing, Heating and Electric	Denver metro	Furnaces, AC, mini splits	One company for every system

Best HVAC Companies In Denver

1. Roots Heating and Air: 24-Hour Furnace And AC Repair

Roots offers 24-hour furnace repair and AC service in Denver and regularly appears in consumer roundups of the city’s best HVAC companies. A good first call when the heat goes out overnight.

2. UniColorado Heating and Cooling: Residential Specialist With Fast Response

UniColorado focuses on residential homeowners across the Denver metro and is highly rated on review platforms. It handles installs, repairs and maintenance for furnaces, air conditioners and heat pumps.

3. SWAN Plumbing, Heating and Air of Denver: Heating, Cooling And Plumbing With Regular Specials

SWAN provides furnace repair, AC service and plumbing across Denver and Littleton and publishes regular coupons and specials. Useful if you want one company for the furnace and the water heater.

4. Pasterkamp Heating and Air Conditioning: Decades Of Denver Service With A Focus On Honest Communication

Pasterkamp has served Denver properties for decades and emphasizes responsive service and experienced technicians. A steady, established option for repairs and replacements.

5. ARS Rescue Rooter Colorado: Large Network With Day-Or-Night Dispatch

ARS runs a large Colorado operation covering Aurora to Boulder and Lakewood to Loveland, with technicians on call day and night. Its size makes scheduling easier during cold snaps and heat waves.

6. Brothers Plumbing, Heating and Electric: Family-Owned Multi-Trade Shop With A 2-Year Guarantee

Brothers handles furnaces, air conditioning and ductless mini splits alongside plumbing and electrical work, and backs furnace repairs with a two-year parts and labor guarantee. Family owned since 1980.

How To Choose An HVAC Company In Denver

Will they do a load calculation?

Replacement systems should be sized with a Manual J load calculation, not by matching the old unit. Oversized equipment short-cycles and wastes energy.

Do they handle Xcel Energy rebates?

Xcel Energy and the state offer rebates on high-efficiency furnaces and heat pumps. Ask the contractor to include eligible rebates in the quote.

Are permits included?

Denver requires mechanical permits for equipment replacement. Confirm the permit and inspection are in the price.

What does the maintenance plan include?

A spring AC check and fall furnace tune-up catch most problems early. Compare what each company’s plan includes and whether members get priority scheduling.

Conclusion

With Denver’s temperature swings, a dependable HVAC company is worth having on speed dial before you need it. Shortlist two or three from the list above, get written quotes and ask about rebates before you replace any equipment.