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During winter months, for example, an air conditioning register can be closed to prevent cold air from being pulled from the room. This allows the hot air to mix more completely with the cold air in the room, improving the efficiency of the HVAC system. [7] (The return should be efficient enough to draw off the cooler air.) [10] [11]
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 system. [1] An air handler is usually a large metal box containing a blower , furnace or A/C elements, filter racks or chambers, sound attenuators , and dampers . [ 2 ]
When not in use, the hose is loosely coiled around a wire rack mounted on a closet wall, or on the back of a door. An alternative for storing vacuum hoses is the "Hide-A-Hose" system, which uses suction to draw the hose into the vacuum piping in the wall for storage. Hose lengths used are typically 30/40/50 ft (9/12/15 m).
The air blower's flow rate is variable. For a single VAV air handler that serves multiple thermal zones, the flow rate to each zone must be varied as well. Simple VAV terminal unit. A VAV terminal unit, [9] often called a VAV box, is the zone-level flow control device. It is basically a calibrated air damper with an automatic actuator. The VAV ...
An art handler, also sometimes called an art preparator, is a trained individual who works directly with objects in museums, art galleries and various other venues including private collectors, corporate art collections, public art collections and various other institutions.
Case officers will also teach agents how to develop cover for status, and cover for action, meaning how to establish credible pretexts for their presence and behavior while engaged in collection activities. A well-trained and competent agent can conduct his or her clandestine tasks while under close surveillance, and still evade detection.