Rooftop units come in a variety of shapes, sizes and capacities. They can be cooling only, heating only, or a combination of both. Typically a rooftop unit is classified as bottom, side, or end discharge and is referred to as electric/electric (electric cooling and electric heating) or gas/electric (electric cooling and gas heating). AMSS has extensive experience on Rooftop unit ranging in capacity from 2-ton to 100-tons