A HVAC rooftop unit is a type of heating, ventilation, and air conditioning (HVAC) system that is typically installed on the roof of a building. It is designed to provide efficient and effective climate control for the interior of the building, as well as to reduce energy costs. HVAC rooftop units are typically made up of several components, including an evaporator coil, condenser coil, compressor, blower, and ductwork. The evaporator coil absorbs heat from the air inside the building, while the condenser coil releases heat to the outside. The compressor then pumps the refrigerant between the two coils, allowing the system to cool or heat the air inside the building. The blower then pushes the conditioned air through the ductwork and into the building. HVAC rooftop units are an efficient and cost-effective way to provide climate control for any building.