A commercial rooftop AC unit is a type of air conditioning system that is installed on the roof of a commercial building. This type of AC unit is typically larger than residential AC units and is designed to cool larger spaces. It is usually a split system, meaning it has two parts – an outdoor unit and an indoor unit. The outdoor unit is mounted on the roof and contains the compressor, condenser, and evaporator. The indoor unit is typically located inside the building and contains the air handler and blower. The outdoor unit is responsible for taking in the hot air from outside and cooling it, while the indoor unit is responsible for circulating the cooled air throughout the building. Commercial rooftop AC units are an efficient and cost-effective way to cool large commercial spaces.