The air handling unit is an integrated piece of equipment consisting of heating and
cooling coils, air-control dampers, filters & silencers, air handling's are often called ahu.
The purpose of this equipment is to collect and mix out door air with that returning from the building space.
The air mixture is then cooled or heated,after which it is discharged into building space.
Through a duct system air handler is normally associated with heating /cooling (hvac) systems.
They are normally mounted on the floor of roof mounted. they often have an economizer or inlet damper.
This also includes the following fans, filters,cooling coils, humidifiers & energy saving instrumentals and technology.