From heating up a cool office on winter mornings to keeping it from becoming unbearably hot during summer afternoons, the rooftop AC and heat unit is an essential component of any business’s cooling system. But what does the official definition of this vital machinery entail? The answer might surprise you! The rooftop AC and heat unit is essentially an integrated combination of an air conditioner and a heater installed directly on the roof of a building. It usually consists of a compressor, an evaporator coil, and refrigerant lines, which all work together to regulate the temperatures in the environment beneath it. By combining both cooling and heating capacities into one machine, rooftop AC and heat units offer both reliable temperature management, as well as energy and cost savings all year round.