John M. Jacobs Plumbing & Heating is a mechanical contracting firm that undertakes commercial and industrial projects. It specializes in the fields of fire protection, gas piping, laboratory plumbing, pneumatic piping, refrigeration, and heating, ventilation and air conditioning. The firm, incorporated in 1973, maintains a fleet of welders, threading machines, boom trucks and other large-scale construction tools. John M. Jacobs Plumbing & Heating features high-performance computers for job tracking, quoting and bookkeeping. It is licensed by the state of Michigan to install hot water and steam boilers. The company performs various types of heating, ventilation and air conditioning work, including in-floor radiation. John M. Jacobs Plumbing & Heating also has expertise to fabricate and install Teflon-lined piping systems. It additionally offers design assistance for wastewater treatment facilities.