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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 HVAC system pushes through your home: humidity, filtration, purification, and the ductwork that carries it all.

Common Problems We Fix

Sound Familiar?

  • Dry skin, static, cracked wood floors

    Winter indoor 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 bypass unit captures the fine particles a standard 1-inch filter lets through.

  • Allergies and asthma flare-ups

    UV lights and electronic air cleaners reduce mold, pollen, and dander circulating through the ducts.

  • Dusty rooms 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 measure and balance the system.

  • Stale, stuffy air in tight new homes

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

Get My Free Estimate

Takes less than 30 seconds. A real person calls you back.

What's Included

Everything Under the Indoor Air Quality Umbrella.

Most air quality upgrades install in a couple of hours and can be bundled with a furnace or AC visit to save on the trip.

Financing & rebates
  • Whole-home humidifiers and dehumidifiers
  • Media filtration and HEPA upgrades
  • UV germicidal lights and air purifiers
  • Duct sealing, repair, and cleaning
  • Energy-recovery ventilators (ERV) for tight homes
  • Carbon monoxide and air quality testing
  • 5.0 500+ Happy Customers
  • NATE NATE CertifiedIndustry Qualified
  • BBB A+ RatingBetter Business Bureau
  • LENNOX We Service
    Lennox Systems
  • TRANE We Service
    Trane Systems

Good Questions

Indoor Air Quality FAQ.

All homeowner questions
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 filter slot to a media cabinet in one visit.

Is duct cleaning worth it?

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

Real Denver Neighbors

Five Stars Feel Different Here.

See More Reviews
  • Furnace repair
    “Duality was amazing! Fast, honest, and got our heat back on the same day. So refreshing to work with a company that actually cares.”
    Sarah M.Denver, CO
  • AC repair
    “Professional, on time, and incredibly knowledgeable. They explained everything clearly and didn’t try to upsell us. Highly recommend!”
    Mike T.Lakewood, CO
  • Heat pump install
    “Best HVAC company we’ve ever used. Friendly, local, and truly neighborly. Our home has never been more comfortable!”
    Emily R.Denver, CO

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) 518-4328, open 24/7 in denver.

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(720) 518-4328Open 24/7 in Denver Book a Service