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Duality Heating and Air

Indoor Air Quality

Breathe easier at 5,280 feet.

Denver air is dry, thin, and some weeks full of wildfire smoke. We fix what your system pushes through your home: humidity, filtration, purification, and the ducts that carry it. Start with a $99 assessment that measures instead of guesses.

  • $99 air quality assessment
  • Same-day across Denver
  • Written price first
Get My Free Estimate (720) 447-0177

Good to know

  • Measured, not guessedThe $99 check tests particles, humidity, and pollutants before anything is suggested.
  • Built for a dry cityDenver winters run under 15% indoors. A whole-home humidifier brings it to a healthy 35 to 45%.
  • Only what helpsSometimes the answer is a better filter. We say so.

$99 Air quality assessment. Measured report with next steps.

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.

Common problems we fix

Sound familiar?

  • Dry skin, static, cracked floors

    Winter humidity here often drops below 15%. A whole-home humidifier brings it to a healthy 35 to 45%.

  • Wildfire smoke indoors

    A MERV-13 media filter or HEPA unit catches the fine particles a standard 1-inch filter lets through.

  • Allergies and asthma flare-ups

    UV lights and air cleaners cut mold, pollen, and dander moving through the ducts.

  • Dust right after cleaning

    Leaky return ducts pull attic and crawlspace dust into the system. Sealing fixes the source.

  • Rooms that never feel right

    Uneven airflow from undersized or disconnected ducts. We inspect, seal, and balance the system.

  • Stuffy new home

    An energy-recovery ventilator brings in fresh air without throwing away the heat you paid for.

Get My Free Estimate

$99 Air quality assessment. Measured report with next steps.

What’s included

Everything under indoor air quality.

Most air quality upgrades install in a couple of hours and can ride along with a furnace or AC visit to save the trip charge.

How pricing works Financing and rebates
  • $99 indoor air quality assessment (particles, humidity, pollutants) with a written report
  • Whole-home humidifiers and dehumidifiers
  • Media filtration and HEPA upgrades
  • UV lights and air purifiers
  • Ductwork inspection, sealing, and repair
  • Energy-recovery ventilators for tight homes

Good questions

Indoor Air Quality FAQ.

Which filter should I use?

For most Denver homes a 4-inch MERV-11 to MERV-13 media filter is the sweet spot. It catches smoke and pollen without choking airflow. We can convert a 1-inch slot to a media cabinet in one visit.

Is duct cleaning worth it?

Only if the ducts are actually dirty or you just finished a renovation. Sealing leaky ducts usually does more for air quality and bills. We look and tell you which you need, if either.

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