An Air Handling Unit (often abbreviated to AHU) is a machine used to transfer with hydronic convection system, and modify the air in a structure, AHU as part of a complete Air Conditioning (HVAC) system, Ventilation, and Heating. This is a Primary System, which can include an assortment of components, depending on size, purpose, and location. The unit collects return air, possibly mixes it with outside air, then conditions the air through either cooling or heating, and sends it back through the building supply ducts, all the while filtering the air at several points. This unit can be configured to suite multiple applications, included residential, commercial, and laboratory settings. Residential and Commercial applications are basically the same, varying only in size and power of the components. The System well suited for these applications, as it accomplishes a task. It is able to filter the air as it conditions it, and introduce fresh outdoor air to the interior of the building. A AHU can be sized significantly larger, with more complex controls to filter a all of the air inside a room at regular intervals. These ‘Clean Rooms’ are very important for Manufacturing, Testing, and Assembly applications, where contaminants in the air must be taken out to keep up the serviceability of the structure. AHU are also capable of conditioning the supply air to a very specific temperature and humidity, which is also important in laboratory settings where air conditions can effect results.
