Welcome  to HHI Heating & Air Conditioning

HHI is a Heating, Air conditioning and Appliance Service Company, We specialize in Installations and Repair of all Brands of Air Conditioning Equipment, from split system air conditioning, package unit air conditioning, p-tac air conditioning, Frederick and Hagerstown Mitsubishi Diamond Contractor installing and repairing mini split air conditioning, and window air conditioning repairs .Servicing all types of Forced Air Heating, Boiler Heating, Natural Gas Heating, Electric Force Air Heating, Oil Heating and Air conditioning equipment. We Specialize in Appliances, Air Conditioning, Gas Heating, Heat Pumps and Air Duct Cleaning. We are located between Frederick and Hagerstown Maryland, and service Frederick Maryland, Hagerstown Maryland, Martinsburg West Virginia, and Charlestown West Virginia cities and surrounding counties.

        We have 24 Hour Emergency Service, 7 Days A Week  to  Frederick , Hagerstown,and surrounding counties...

Your Heating & Cooling Specialist!

Contact Information

Office Hours 
     8:00 AM - 4:30 PM
Telephone 
     240-626-6491
FAX 
     301-432-7457
Postal address 
     P.O. Box 447 Walkersville, Md. 21793 
Electronic mail
     General Information: HaynesHomeImprovement@msn.com
     Sales: EdHaynes@HHI4Heating-cooling.com
     Customer Support: HaynesHomeImprovement@msn.com
     Webmaster: EdHaynes@HHI4Heating-cooling.com