Straight answers. No pitch.

Yes. A Denver-based dispatcher answers nights, weekends, and holidays, and emergency visits never carry overtime rates.

Make sure the thermostat is set to Heat and above room temperature, the furnace switch (looks like a light switch near the unit) is on, the breaker is not tripped, and the filter is not clogged. If you smell gas, leave the house and call your gas utility first.

Same day across the Denver metro. No-heat and no-cooling calls during extreme weather are prioritized and usually reached within a few hours.

After diagnosing the problem we give you a written, flat-rate quote before any work starts. The price you approve is the price you pay.

Yes, $99, day or night. It covers the trip and a full diagnosis, and if you go ahead with the repair it comes off the bill. A seasonal tune-up and an indoor air quality assessment are also $99 each.

All of them: cash, check, Visa, Mastercard, American Express, Discover, Apple Pay, Google Pay, Zelle, Venmo, and financing through our lending partner. You can pay the technician on site or from the invoice link.

Yes, through a lending partner with approval in minutes and options including low monthly payments and promotional-rate plans. We also help you claim Xcel Energy rebates and Colorado heat pump tax credits.

If a repair will give you several more reliable years at a fair cost, we recommend the repair. We only suggest replacement when the math or safety clearly favors it, and we show you both options.

All of them. Lennox, Trane, Carrier, Bryant, Rheem, Ruud, Goodman, Amana, American Standard, York, Daikin, Mitsubishi, Fujitsu, Bosch, Navien, Rinnai, and every other brand you will find in a Denver home. If it heats or cools a house, we service it.

Furnaces (including Low-NOx models up to 99% efficient), air conditioners, cold-climate heat pumps, ductless mini splits, humidifiers, air purifiers, and smart thermostats. Xcel Energy rebates are available on qualifying equipment and we file them for you.

Modern cold-climate heat pumps hold full capacity to about 5°F and keep running below zero. Most Denver homeowners pair one with their existing furnace as a dual-fuel system for the coldest nights.

Whether it’s a 1-inch or a 4-inch filter, check it monthly and change it as needed. Every home is different: pets, dust, and smoke season all shorten the interval. If you can’t see light through it, it’s done.

The greater Denver metro, from Golden to Aurora and Castle Rock to Thornton: Denver, Lakewood, Aurora, Englewood, Littleton, Arvada, Westminster, Thornton, Centennial, Highlands Ranch, Wheat Ridge, Golden, and Castle Rock.

Yes. Duality Heating and Air is a Colorado LLC that is licensed, bonded, and insured. Every technician is NATE-certified, EPA 608 certified, and background-checked. You get a text with your tech's name and photo before they arrive.

Yes, on every installation. We schedule the inspection and register your manufacturer warranty so it is valid from day one. Permits can and should be pulled on every job, but every home, job, and municipality is different, so the permit cost varies widely. It’s on the written estimate, never a surprise.