Denver, Colorado · Denver County
Heating and cooling in Denver, done by a neighbor.
Our home turf. From Capitol Hill brick to Central Park new-builds, we service every kind of system the city has. Older Denver homes often have undersized return ducts, converted floor furnaces, or rooms with no ducts at all. We know them well. Up Santa Fe or I-25 from our Englewood shop. Capitol Hill, Baker, and Wash Park are usually inside 20 minutes; the east side closer to 25.
- About 15 minutes away
- $99 diagnostic
- Written price first
15
min from our shop
5,280
ft elevation
22
zip codes covered
24/7
same-day service
Who we are
Hello. We’re Duality.
Duality Heating and Air LLC is a Denver heating and cooling company run by one licensed technician and the people he trusts. We fix furnaces, ACs, heat pumps, and the air in your home, and we do it the way we’d want it done at our own house. Comfort, in perfect balance.
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Denver-based
One technician who lives here, not a call center in another state.
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Price in writing
You approve the number before we touch a tool. It never changes.
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Fix before replace
We repair what can be repaired and show you both numbers when it can’t.
- 5.0 12 Google reviews, all five stars ↗
- NATE CertifiedNorth American Technician Excellence
- BBB A+ RatingBetter Business Bureau
- LENNOX We service
Lennox systems - We service
Trane systems
Denver questions
Asked by your neighbors.
Do Colorado’s air-quality rules change which furnace I can buy?
The Front Range now favors Low-NOx furnaces, and every furnace we install meets that standard. It also happens to be what unlocks the best rebates.
Our old Denver house has rooms with no ductwork. What are the options?
Usually a ductless mini split. One outdoor unit can heat and cool a few rooms with no ducts at all, and cold-climate models work well below zero. It’s the go-to answer for Capitol Hill, Wash Park, and Highlands homes with additions, sunrooms, or converted attics.
How fast can you reach downtown Denver?
About 15 minutes from our shop in Englewood, traffic permitting. Same-day on almost every call.
Do I need a permit for a furnace replacement in Denver?
Yes, Denver requires a mechanical permit and an inspection. We pull it and schedule the inspection for you.
Common problems
What’s it doing?
Real Denver neighbors
Five stars feel different here.
- HVAC service
Cecilia Gomez
Google review“Professional, knowledgeable, and incredibly helpful. He took the time to explain everything clearly, answered all of my questions, and made the entire process easy and stress-free. I truly appreciated his honesty, responsiveness, and attention to detail.”
- AC repair
Jessica Russman
Google review“Very honest and reliable. He showed up on time and fixed our old AC after we had several companies try to sell us a new one. We would 1000% recommend Duality to anyone who wants to feel confident they’re dealing with the right company.”
- System service
Jake Henriksson
Google review“Punctual, communicative, and extremely professional without being a corporate robot. He tells the truth and gets things done. And he’s a one-man team, so things aren’t going to get lost in translation. 100% recommend.”
What to expect
Your Denver visit, step by step.
- 01
You send the form
A few taps, or call or text. About 30 seconds.
- 02
We call you back
A Denver dispatcher confirms the address and window.
- 03
Price in writing
Flat-rate, before any work. You say yes or no.
- 04
The fix
Most repairs finish on the first visit. Parts on the truck.
Ready When You Are
Need HVAC help in Denver? We’ll call you back in minutes.
Three quick taps. A Denver dispatcher calls to confirm the address and gets a truck moving. About 15 minutes from our shop.
- Written flat-rate price before any work starts
- Same-day service across the Denver metro
- No overtime fees, nights and weekends included
Prefer to talk? (720) 447-0177, open 24 hours.