An Air Handling Unit is a huge indoor unit of commercial air conditioning equipment. This massive âindoor unitâ is installed on a rooftop or along an external building wall. It produces cool/warm air and sends it to the rooms for cooling/heating. Unlike ordinary commercial air conditioners, air handling units are usually made to order for individual buildings. Furthermore, air units can be customized by internally mounting a filter, humidifier and other devices for the control of temperature, humidity, air flow and air cleanliness. The offered Air Handling Unit is very useful and made for industrial uses.