Heating & Cooling Services

One Hour Heating and Air is ready to take care of all your heating and air conditioning needs including installation, repair, replacement, and maintenance.

  • Air Conditioners
  • Boiler
  • Furnaces
  • Indoor Air Quality
  • Heat Pumps
  • Thermostats
  • Air Handler

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Protection Plans

What would happen if you never changed the oil in your car? Like your car, your home's cooling and heating system required regular maintenance and service to operate safely and efficiently.

Join ComfortClub today and receive a wide variety of benefits.

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Our Difference

How do you know a company cares about the quality of their work? They stand behind it - that's how. At One Hour Heating and Air, the warranties and guarantees are industry leading because of our experienced technicians and the high quality parts we use. Our technicians are friendly, clean, polite, drug-free and experienced--and our techniques are state-of-the-art, guaranteed!

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Heating and Air Services in Maryland, Including Frederick

If you live in Frederick, heating and air services are available from the nation's fastest growing franchises. At One Hour Air Conditioning and Heating, your time is our top priority, and our technicians will always be prompt for your appointment. We offer our customers on-time service, every time. When you need trustworthy A/C installations, repairs or maintenance, we understand your time is valuable. We will be there when you need us.

Got a busted A/C? Has your heater gone cold? Whether you need A/C or heater repairs or replacement services, we will make sure to get the job done right the first time. We always stress the five C's: courtesy, cleanliness, competence, convenience and character. We guarantee prompt and professional service to our customers on every job that we do.

We offer a 100% guarantee on all of the work that we do. We are based in Mount Airy, MD, and we serve residents of Frederick, and Rockville, MD. We are available to help residents of the following counties:

  • Carroll
  • Frederick
  • Howard
  • Montgomery
  • Washington

Whether it's the coldest months of winter or the middle of the hottest summer months in Frederick, heating and air services from One Hour Air Conditioning and Heating will allow you to achieve the ideal climate in your home. Call us today!

Welcome to One Hour Heating & Air Conditioning, your source for prompt, courteous, reliable heating and air service. Offering heating and air conditioning maintenance, installation, repairs, and everything in between, our goal is to address your HVAC needs in a timely, efficient, and cost-effective fashion.

Always on Time, or You Don't Pay A Dime
To prove how much we value your time, we guarantee that our technicians will show up when you expect them, or your service is free. It's that simple.

No Mess and No Hassles
Heating and air service doesn't have to be messy. Our technicians will leave your home clean and debris-free, or the job's on us.

Straightforward Pricing
The cost of your heating and air project should be easy to understand. That's why we'll present a price up front and get your approval before proceeding.

Total Comfort Guaranteed
We want you to be completely satisfied with the service you receive. All repairs to your HVAC system are backed by our 100% guarantee. If a repair fails during the current heating or cooling season, we'll repair it again at no cost to you. We also guarantee our air conditioners for five years and furnaces for ten years.

Skilled Professionals
Continuous training and high company standards make our HVAC technicians the most qualified in the industry. With your comfort at stake, you deserve only the best.

A Family Of Home Services:

Strong partnerships and a national support system.