AMHAC or All Makes Heating and Air Conditioning has been in business for more than 45 years. It is a full-service heating, ventilation and air conditioning contractor based in Eastchester, N.Y. The company serves more than 15,000 residential and commercial clients in Westchester, Bronx and Manhattan in New York and Fairfield County in Connecticut. AMHAC designs, engineers, installs and maintains building automation systems and energy management systems. Its staff includes in-house design engineers, field technicians as well as licensed electricians. Additionally, the company has the capability to perform most projects without subcontracting any labor. AMHAC services and installs Carrier Comfort Network Control systems. Its engineers and technicians receive factory training before installing and servicing systems.