Littleton, Colorado · Arapahoe County
Heating and cooling in Littleton, done by a neighbor.
Twelve minutes south. From downtown Littleton to the foothills at Ken Caryl and Roxborough, we cover it. Foothills homes see harder winters and more wind. We size and seal for it. South on Santa Fe or Broadway, about 12 minutes to downtown Littleton; Ken Caryl and Roxborough about 20.
- About 12 minutes away
- $99 diagnostic
- Written price first
12
min from our shop
5,351
ft elevation
6
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
Littleton questions
Asked by your neighbors.
Our Roxborough home loses heat on windy nights. Why?
Wind pushes cold air through duct leaks and gaps faster than the furnace replaces it. Sealing the ducts and a tight filter cabinet usually fix it without new equipment.
Do you go up to Roxborough and Ken Caryl?
Yes. Those homes sit higher and windier than the flats, so we derate furnaces and check duct leakage on every visit.
Is Littleton a good fit for a heat pump?
Very. Sunny winter days and cold nights are exactly the range where a dual-fuel heat pump saves the most.
How fast for a no-heat call in Columbine?
Usually within a couple of hours, day or night.
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 Littleton 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 Littleton? We’ll call you back in minutes.
Three quick taps. A Denver dispatcher calls to confirm the address and gets a truck moving. About 12 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.