Heritage Mechanical Services Incorporated is a leader in the provision of complete heating, ventilation and air conditioning systems for commercial, industrial and institutional clients. The company s mechanical services cover new construction, maintenance and service in both renovation and building projects. It serves health care facilities, commercial office buildings, high-rise residential, manufacturing plants, public transportation, museums and institutional facilities. The company is a wholly owned subsidiary of EMCOR Group, Incorporated. EMCOR Group, Incorporated is a leading supplier of mechanical and electrical construction and facilities services, such as planning, consulting, operations and maintenance. Heritage Mechanical Services Incorporated has head offices in Deer Park, N.Y.