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Duality Heating and Air

Green Energy

Lower bills. Cleaner air. A Colorado worth keeping.

The most efficient equipment made today, installed by a Denver neighbor who runs the numbers on your real utility bills before recommending anything. We handle the Xcel Energy rebate paperwork and the Colorado heat pump tax-credit documents for you.

  • Free in-home estimate
  • Rebates filed for you
  • Written price first
Get My Free Estimate (720) 447-0177

Good to know

  • Up to 99% efficientA modern furnace keeps nearly every dollar of gas in the house instead of the flue.
  • Rebates filed for youXcel rebates and the Colorado heat pump credit, subtracted on the estimate.
  • Dual-fuel readyA heat pump with your furnace as backup for the coldest nights.

Free in-home estimate. No pressure, ever.

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.

  • Denver-based

    One technician who lives here, not a call center in another state.

  • Price in writing

    You approve the number before we touch a tool. It never changes.

  • Fix before replace

    We repair what can be repaired and show you both numbers when it can’t.

What you get

The equipment and the money behind it.

  • Low-NOx furnaces

    Up to 99% efficient and built for the tightest emissions rules. Less gas burned, cleaner Front Range air.

  • Cold-climate heat pumps

    Full heat to about 5°F. Paired with your furnace, it covers most of the Denver winter on cheap electricity.

  • Ductless mini splits

    Heating and cooling for additions, basements, garages, and older homes without ducts. Whisper quiet.

  • ENERGY STAR equipment

    Every system we recommend carries the rating where one exists, which is also what unlocks most rebates.

  • Xcel Energy rebates

    Rebates on qualifying furnaces, ACs, heat pumps, and smart thermostats. We file the forms. You get the check.

  • Smart thermostats and zoning

    The cheapest efficiency upgrade there is. Often bundled free with a new system.

Get My Free Estimate

About 30 seconds. A real person calls you back.

What’s included

Everything under green energy.

Every written estimate shows the price after rebates next to the monthly financing payment, so a standard system and a high-efficiency one sit side by side.

How pricing works Financing and rebates
  • Low-NOx, high-efficiency furnace installation
  • Cold-climate and dual-fuel heat pump systems
  • Ductless mini-split installation, single and multi-zone
  • ENERGY STAR certified air conditioners
  • Xcel Energy rebate filing and Colorado heat pump tax-credit documents
  • Home energy walkthrough with every estimate

Good questions

Green Energy FAQ.

What is a Low-NOx furnace?

A furnace with burners built to produce far less nitrogen oxide, a key ingredient in Front Range smog. Several Colorado utilities and cities now favor or require them, and they qualify for the best rebates.

Will a heat pump save me money in Denver?

For most homes, yes across summer and the shoulder seasons. We model it against your Xcel rates and show you the payback before you decide.

Can a mini split heat a room in winter?

Cold-climate mini splits heat efficiently well below zero. They’re the go-to for finished basements, garages, and additions where running ductwork isn’t practical.

All homeowner questions

Related problems

Real Denver neighbors

  • 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.”

  • 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.”

  • 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 visit, step by step.

  1. 01

    You send the form

    A few taps, or call or text. About 30 seconds.

  2. 02

    We call you back

    A Denver dispatcher confirms the address and window.

  3. 03

    Price in writing

    Flat-rate, before any work. You say yes or no.

  4. 04

    The fix

    Most repairs finish on the first visit. Parts on the truck.

Ready When You Are

Tell Us What's Wrong. We'll Call You Back in Minutes.

Three quick taps. A real Denver dispatcher calls to confirm your address and get a truck moving. No call center, no waiting on hold.

  • 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.

Request service

Step 1 of 4 About 30 seconds
What do you need?
Step 2 · What’s going on?

Step 4 · Who should we call?

A real person calls you back, usually within minutes. 24/7.

Private and secure. We may call or text this number about your request. Reply STOP to opt out.

Two taps and a phone number. Or just call (720) 447-0177.

Where we do this

More services

(720) 447-0177Call now. We answer 24/7. Book a Service