Common problem · This week
Some rooms hot, some rooms cold?
The upstairs is a sauna and the basement is a fridge. This is the most common comfort complaint in two-story Denver homes, and it’s almost never the thermostat.
- $99 diagnostic, credited to the repair
- Same-day across Denver
- No overtime fees
How urgent
Book a visit. We measure airflow room by room and show you the fix.
- Call if: The difference between floors is more than 5°
- Call if: One room never gets comfortable no matter the setting
- Call if: You’re considering a new system anyway
What it usually is
The causes, most common first.
- 1
Leaky or undersized ducts
The rooms farthest from the furnace get the least air. Sealing and balancing fixes most of it.
Sealing and balancing
- 2
No zoning
One system, two floors, one thermostat. Dampers give each floor its own control.
A zoning system
- 3
Undersized return
The system can’t pull enough air back, so it can’t push enough out.
Adding a return
- 4
Mini split for the problem room
For a basement, bonus room, or addition, a ductless unit is often the cleanest fix.
A ductless mini split
Every fix gets a written price before any work. The $99 diagnostic is credited toward it.
Try this first
What to check before you call.
If one of these fixes it, great. If not, you’ve saved us five minutes on the diagnosis.
- 1
Open every supply vent, even in rooms you don’t use.
- 2
Check that furniture isn’t covering returns.
- 3
Note which rooms are off and by how much; bring that list to the visit.
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.
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Denver-based
One technician who lives here, not a call center in another state.
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Price in writing
You approve the number before we touch a tool. It never changes.
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Fix before replace
We repair what can be repaired and show you both numbers when it can’t.
Questions
Uneven Temperatures, answered.
Is closing vents in unused rooms a good idea?
No. It raises pressure in the ducts and makes leaks worse. Balance the system instead.
From Denver neighbors
- HVAC service
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.”
- AC repair
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.”
Free estimate
Some rooms hot, some rooms cold? Tell us. We’ll call 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.
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