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Ducts commonly also deliver ventilation air as part of the supply air. As such, air ducts are one method of ensuring acceptable indoor air quality as well as thermal comfort. A duct system is also called ductwork. Planning (laying out), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design. [2]
An intermediate fluid is used when the hot and cold fluids are too bulky (such as air) or difficult to handle (such as halo carbon refrigerant) to directly transfer the heat. louver 1. Components made of multiple smaller blades, sometimes adjustable, placed in ducts or duct entries to control the volume of air flow.
HVAC turning vanes are sheet metal devices inside of mechanical ductwork used to smoothly direct air inside a duct where there is a change in direction, by reducing resistance and turbulence. See also
The heat transfer medium is a refrigeration system, such as water, air, ice, and chemicals are referred to as refrigerants. A refrigerant is employed either in a heat pump system in which a compressor is used to drive thermodynamic refrigeration cycle , or in a free cooling system that uses pumps to circulate a cool refrigerant (typically water ...
The word duct is derived from the Latin word for led/leading. It may refer to: Duct (anatomy), various ducts in anatomy and physiology Tear duct, which carry tears to the eyes; Duct (HVAC), for transfer of air between spaces in a structure; Duct tape, a kind of adhesive tape; Ducted fan, motor for aircraft; Electrical bus duct, a metal ...
A grille is a perforated cover for an air duct (used for heating, cooling, or ventilation, or a combination thereof). Grilles sometimes have louvers which allow the flow of air to be directed. A register differs from a grille in that a damper is included.
A forced-air central heating system is one which uses air as its heat transfer medium. These systems rely on ductwork , vents , and plenums as means of air distribution, separate from the actual heating and air conditioning systems.
Air streams are mixed to save energy and improve energy efficiency by partially recirculating conditioned air.. The most common application for an air-mixing plenum is the mixing of return air (or extract air) with fresh air to provide a supply air mixture for onward distribution to the building or area which the ventilation system is serving. [1]
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