Since 1929, in Baltimore, Maryland and the surrounding metropolitan area, the skilled technicians at Frank J. Klein & Sons have helped our customers with their plumbing, heating and air conditioning needs. We are a family owned service and installation company, and take pride in our friendly, capable customer service and licensed technicians.

Frank J. Klein & Sons specializes in installation and service repairs on hot water heaters, boilers, heat pumps, air conditioning systems, furnaces, attic fans, hot water and steam heating systems, furnace and heat pump installations from the major manufacturers. Our business can do everything from faucet repairs to complete system replacements.

We are also proud to provide geothermal heating and cooling for an environmentally friendly system, and duct cleaning, electronic air cleaners, and humidifiers for indoor air quality. If you are interested in maintaining optimal performance of your existing heating and cooling equipment, Frank J. Klein & Sons offers planned maintenance agreements offering routine inspections.

Estimates for heating, cooling and hydronic equipment replacements, as well as plumbing remodeling projects are FREE – please call us to set up an appointment today.