Your Comfort Is Just A Call Away

Durham Heating & Cooling Experts

Don't Let "Small" Problems Turn
Into Big Ones. One Hour Can Help.

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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 whole goal is to make your home better. 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.

About Us

Green Horizon One Hour 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.

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

‘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.
100% Satisfaction Guarantee
We guarantee our materials, labor, and craftsmanship
for up to two years from the date of your service.
We Love What We Do
Our trained Comfort Specialists are friendly,
knowledgeable, and genuinely love helping people.

Learn More About Us

We Have A Reputation For Being Punctual, Friendly, and Knowledgeable

“Jonathan W. was personable, friendly, professional, thorough, honest in his evaluation and worked hard! You have a jewel in this young man.....he is a keeper!”
“I want to thank you for your excellent service. Abdiel answered all my questions and was very professional. He gave me peace of mind and complete comfort. I know I am in good hands with your company.”
“Austin was my tech. He was on time, courteous and professional. Same day service!! Everything is "cool" now!”
“Wiley was super helpful in explaining the problem, offering cost efficient solutions, and even helping us the following week when we filed our home warranty claim. I will be asking for his support for ...”
“Gary’s had replaced my air conditioner a couple of years ago. I called them because I smelled a little musty smell from one of my vents. They came out and found my problem quickly, got it fixed and ...”
“I set up an appointment to have our unit serviced, and Ivan was our technician. He arrived on time, and was very professional. He serviced the unit for the price that was advertised in their TV ...”