An Energy Star contractor, AP Merkel is a family-owned business that serves customers in Berks County in Pennsylvania. Operational since 1860, the company installs and services plumbing, heating and cooling products. It undertakes several residential and commercial projects. AP Merkel offers a line of geothermal heat pumps, humidifiers and thermostats. The company also provides a range of hot water baseboard systems, fixtures and faucets. It offers products from various manufacturers, such as Kohler Company, Viega, Aprilaire and Honeywell International. AP Merkel provides free estimation services. The company additional offers metal and fiberglass ductwork. It is a member of the Plumbing-Heating-Cooling Contractors-National Association.