Proudly serving Frederick and Montgomery Counties and surrounding areas
Call Our 24/7 Emergency Help Line     Mt. Airy 301-540-1111     Silver Spring 301-515-1001

Direct Ship Filter Program

We are pleased to help you and your family breathe cleaner air all year long with regular replacement filters shipped right to your doorstep! Learn More!

Why One Hour?

We treat your home with the respect it deserves. Our technicians are all background-checked, drug-tested and provide clean, friendly service… guaranteed! Learn more about our technicians


See if you qualify for our oustanding financing options Apply Now!
Print Coupons & Special Offers! View all coupons >>

Heating & Cooling Services

One Hour Air Conditioning & Heating can take care of all your home comfort needs including installation, repair, replacement, and maintenance to keep your family comfortable and safe all year long. We install and service:
  • Air Conditioners
  • Furnaces
  • Heat Pumps
  • Boiler
  • Indoor Air Quality
  • Thermostats
  • More

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. Get the Home Comfort Collection today
and receive a wide variety of benefits.

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 Air Conditioning & Heating, 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!

One Hour Gift Cards

Whether it's a repair, new system or service call, your card will help you feel more comfortable by saving you $100! With the One Hour Air Conditioning & Heating gift card program, you’ve got nothing to lose! (limit one gift card per household). Click Here to Activate Your Card

Join the Heros Club

Are you a veteran, currently serving in the armed forces, or a first responder? If so, we want to thank you for your service with discounts and preferred status with our Heros Club. Click Here to Learn More

Heating and Air Conditioning Services in Maryland

LOCALLY OWNED & OPERATED SINCE 2000. At One Hour Air Conditioning and Heating serving throughout Maryland from Gaithersburg to Silver Spring, 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. Need service in Sykesville or New Market? We will be there when you need us.

Got a broken 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.

Whether it’s the coldest months of winter or the middle of the hottest summer months, 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!

We're the talk of the Town! Read more reviews & Testimonials >>