M.S. Johnston Co. is licensed in Maryland, Pennsylvania, West Virginia and Virginia.

For information, quotations, or customer service, please contact us.

M.S. Johnston Co., Inc.
13261 Pennsylvania Ave.
Hagerstown, MD 21742

HVAC phone 301-733-1066
HVAC fax 301-797-9675
HVAC e-mail
 
Food Service phone 301-733-1075
Food Service fax 301-665-1885
Food Service e-mail
 
Toll free phone 1-888-558-5346



Our professional affiliations include:
  • Associated Builders and Contractors
  • National Federation of Independent Businesses
  • American Society of Heating, Refrigerating & Air Conditioning Engineers
  • Supermarket Equipment Incorporated (ISE)
  • Washington County (MD) Chamber of Commerce