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  2. Register (air and heating) - Wikipedia

    en.wikipedia.org/wiki/Register_(air_and_heating)

    A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. The placement and size of registers is critical to HVAC efficiency. Register dampers are also important, and can serve a safety function.

  3. Grille (architecture) - Wikipedia

    en.wikipedia.org/wiki/Grille_(architecture)

    A wooden window grill in Plaza del Conde del Real, Valencia ().The structure was probably used as a stable. Grille, and control for an air duct. A grille or grill (French word from Latin craticula, small grill) is an opening of several slits side-by-side in a wall, metal sheet or another barrier, usually to allow air or water to enter and/or leave and prevent larger objects (such as animals ...

  4. Diffuser (thermodynamics) - Wikipedia

    en.wikipedia.org/wiki/Diffuser_(thermodynamics)

    A round diffuser in an HVAC system. Diffusers are very common in heating, ventilating, and air-conditioning systems. [3] Diffusers are used in both all-air and air-water HVAC systems, as part of room air distribution subsystems, and serve several purposes: To deliver both conditioning and ventilating air

  5. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    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. The return plenum carries the air from several large return grills (vents) to a central air handler for re-heating ...

  6. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.

  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    grille A facing across a duct opening, often rectangular in shape, containing multiple parallel slots through which air may be delivered or withdrawn from a ventilated space. The grille directs the air flow in a particular direction and prevents the passage of large items. heating coil A heating coil is the part of the system that conducts heat.

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