A HVAC rooftop package unit is a type of air conditioning system that is installed on the roof of a building. It is designed to provide efficient and reliable cooling and heating for the entire building. The unit typically consists of an outdoor condenser, an indoor evaporator, and a fan to circulate the air. The condenser is responsible for removing heat from the air and transferring it to the outside environment. The evaporator is responsible for absorbing heat from the air and transferring it to the inside of the building. The fan then circulates the air throughout the building. The rooftop package unit is a great option for buildings that don’t have a lot of space for an air conditioning system, as it takes up minimal space and can be installed quickly and easily. Additionally, the rooftop package unit is energy efficient and cost effective, making it a great choice for any building.