Here ahu installation procedure ( celling suspended ) They are usually located in the basement, on the roof or on the floors of a building. AHU's will serve a specified area or zone within a building such as the east side, or floors 1 – 10 or perhaps a single purpose such as just the buildings toilets. Therefore, it's very common to find multiple AHU's around a building. AHU is a large metal box containing separate ventilators for supply and exhaust, heating coil, cooling coil, heating/cooling recovery system, air filter racks or chambers, sound attenuates, mixing chamber, and dampers. including fan section , coil section , filter box , Belt guard , 16mm support rod , motor,supply air duct outlet ,support channel full length, under unit as shown in drawing also plan view ,front elevation view Inside an AHU we will typically find two sets of filters. The first set is known as the primary filters and we also then have the secondary filters. These both have different functions in an air handling unit. for more details download this file.
