Rooftop Packaged air conditioning units are the perfect solution for commercial situations where large areas require air conditioning. A Rooftop Package unit is a fully self-contained system that is normally located outside the building either on the roof or on the ground. They can also be installed internally but require the condenser air to be vented. The brands we use and recommend are Daikin and Actron Air and are available in various sizes but are mainly more popular where a large area needs to be air conditioned. Once the system is positioned, ducting for the supply air and the return air is connected and run into the building to distribute air. The system itself only requires the nominated power supply and the control wiring to make it operational.