Heating and Air Conditioning Services for Dayton, Ohio

Need Service Today?

Extreme’s One Hour Heating & Air Conditioning, a premier HVAC repair and replacement service provider, takes pride with our industry best “on-time guarantee”.   We pride ourselves in being ready when you need us!  There is no reason to wait around at home for the technician to arrive, Extreme’s One Hour Heating and air Conditioning gives you convenient scheduling options and we will be there on time!  Never wait at home on us to arrive. We offer ½ hour call or text ahead to let you know the technician is on the way.  Call us now  937.426.7399

Local Company with a National Backing.

Locally owned and operated, our entire staff is ready to assist you the moment you call. You can expect the same service from the nearly 300 other One Hour Heating and Air Conditioning shops across the country. Being part of an organization as large as One Hour gives us leverage and backing with all the major brands such as Trane, Carrier, Lennox, Bryant, Honeywell, Goodman and Amana…and many more.  Being part of the One Hour Family allows us to stock our trucks like rolling warehouses carrying a large amount of parts and equipment so you don’t have to wait.  

Need a new system installed?

We are happy to provide you a free estimate, for your home or business, to replace your furnace, air conditioner, heat pump, or entire system. We carry many lines of equipment; we are a Trane Comfort specialist as well as Amana factory certified dealer. Please look at our top 7 reasons why you should consider using Extreme’s One Hour when replacing your Heating and Air Conditioning system.

6-time Angies List super service award winner.   Dayton BBB Integrity Eclipse award winner.

Check out what our great customers have to say about us on Home Advisor, Facebook and Google!


Comfortable and energy efficient natural gas heat for your home with constant air circulation all year long.  Call us to learn more.

Heat Pumps

A dual purpose system from that heats your home in the winter and cools it in the summer.  Set up a free no cost estimate today!

Air Conditioners

We provide economic and efficient home cooling options from multiple manufactures. Get ready for summer.  Call us today to save!!

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Why Choose Extreme Heating and Air Conditioning

  • Over 10 Years Servicing the Dayton, Ohio Area
  • Free in-Home, no-obligation estimates
  • Emergency Service — 24 hours a day, 7 days a week, 365 days a year.
  • Award winning Comfort Club saves you money year after year.
  • Always on time…. or you don’t pay a dime!

What our Happy customers say:

Wow, Extreme’s One Hour Heating and Air are true experts in their field. My family and I had suffered from uneven, uncomfortable temperature throughout our entire home for years. Not only did One Hour fix this issue completely while installing my new system, I saved a small fortune. With the tax match program, rebates and discounts from One Hour I saved over $3,500.00!
Jim Kroger - Centerville
My property has 2 furnaces installed by Extreme. Both are heat pump with natural gas backup. Both furnaces (one 4 years old, one just installed) were done promptly and are what we expected. I would gladly endorse and recommend Extreme.
R. Papajcik

Call us today for Heating and Air Conditioning Services for Dayton, Ohio