


Don't Let "Small" Problems Turn
Into Big Ones. One Hour Can Help.
Some of Our Specialties
Keep safe. Be comfortable. Save money. All Year.
Learn how our Optimizer goes way beyond ordinary fall check-ups.

Durham HVAC Services
Air Conditioning and Heating That Makes Your Home Better
After hangin’ up my Air Force pilot wings, I started what would become Green Horizon One Hour in 2007. Our goal is to make your home better with the comfort provided by quality HVAC services. It’s probably why we’re the #1 installer of home efficiency improvements in the Raleigh – Durham – Chapel Hill area. Plus, those geothermal and super high efficiency systems are freakin’ cool. And everything you choose is covered by our Whole House Promise.

Raleigh-Durham HVAC Services with a Whole House Promise
We Don't Sell You Things You Don't Need
Our Whole House Promise means we won’t recommend things you don’t need. If anything we recommend and install doesn’t improve your home’s efficiency, we’ll replace it or give you 100% of your money back within one year. This way, you can be certain that our Raleigh-Durham HVAC repairs, installation, and maintenance are services that you can trust for years to come.


Always On Time...
Or You Don't
Pay A Dime!®

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‘Round the Clock Availability
No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
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100% Satisfaction Guarantee
We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
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StraightForward Pricing® Guide
Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
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Always On Time…Or You Don’t Pay A Dime!®
We understand your time is valuable, so we promise to arrive at your home within the predetermined one-hour time window that you select, or your service call is free.





Here for You Around the Clock
Our Comfort Specialists are available to help, no matter the time of day. If you're in need of emergency services, we've got you covered 24/7.


