Call 24/7 for emergency service 301.515.1001

Frederick - HVAC Technician

Your local One Hour Heating & Air Conditioning has been serving the Frederick area for many years. We promise prompt and professional service to all of our customers. "Always on time, or you don’t pay a dime."™ We look forward to solving all your heating and air conditioning repair, installation and service needs. Call us now to schedule an appointment.
2702 Back Acre Circle Mt. Airy, Maryland 21771
Available 24/7
  • SPECIAL OFFERS

    We're sorry, but looks like we don't have any special offers listed for your location at this time.  Please call your local One Hour Heating & Air Conditioning at 301.515.1001 to see if any new offers are available for you!

  • Maintenance Program

    The One Hour Heating & Air Conditioning® maintenance agreement, Comfort Club™, provides you with regular system checks. 

    A Comfort Club™ agreement will keep your system running at its peak.


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A family of home services:

Strong partnerships and a national support system.

Independently owned and operated.