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Duality Heating and Air

Cooling Services

Cool, Quiet, and Ready for the Next 100-Degree Week.

AC repair, replacement, and heat pump installation for Denver's dry, high-altitude summers. Fast dispatch when it quits on the hottest day, honest advice when it's time to upgrade.

Common Problems We Fix

Sound Familiar?

  • Blowing warm air

    Low refrigerant, a failed capacitor, or a frozen coil. We find the actual cause instead of just topping off refrigerant.

  • Outdoor unit won't start

    Capacitors and contactors fail in the heat. A fast, inexpensive fix when caught early.

  • Ice on the lines

    Airflow or refrigerant problem. Turn the system off so the coil can thaw, then call us.

  • Water around the furnace

    A clogged condensate drain or cracked pan. Fix it before it reaches drywall.

  • Runs constantly, never cools

    Undersized, leaking ducts, or a system that has lost capacity. We measure rather than guess.

  • Loud buzzing or grinding

    Failing fan motor or compressor. Shut it down and call to avoid a bigger bill.

Get Help Fast

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

What's Included

Everything Under the Cooling Services Umbrella.

Written flat-rate quote before any work. If a repair doesn't make sense, we tell you, and the diagnostic fee is credited toward a new system.

Financing & rebates
  • Air conditioner repair on every major brand
  • New central AC and cold-climate heat pump installation
  • Ductless mini-split systems for additions and older homes without ducts
  • Evaporative (swamp) cooler service and replacement
  • Refrigerant leak detection and repair
  • Seasonal AC tune-ups and coil cleaning
  • 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

Cooling Services FAQ.

All homeowner questions
Do heat pumps work in Denver?

Modern cold-climate heat pumps hold full capacity to about 5°F and keep running below zero. Paired with your existing furnace as a dual-fuel system, they cut summer and shoulder-season bills without giving up the furnace on the coldest nights.

How long does an AC installation take?

Most replacements are done in a single day. We pull permits, handle the inspection, and register the warranty for you.

Why did my swamp cooler stop keeping up?

Denver summers have gotten more humid. Many customers are moving to a heat pump or AC that also handles the drier, hotter days. We service both and will tell you honestly which fits your home.

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