Air Cooling Ducting Work

An air handler, or air handling unit ( often abbreviated to AHU ), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning ( HVAC ) system. An air handler is usually a large metal box containing a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to a duct work ventilation system that distributes the conditioned air through the building and returns it to the AHU. Sometimes AHUs discharge ( supply ) and admit ( return ) air directly to and from the space served without ductwork.