Grille

A wooden window grill in Plaza del Conde del Real, Valencia (Spain ). The structure was probably used as a stable.

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) from going in or out.[1]

A similar definition is "a French term for an enclosure in either iron or bronze."[2]

## Register vs. grille

In heating, cooling, ventilation, or a combination thereof, a grille is a perforated cover for an air duct. Grilles sometimes have louvers which allow the flow of air to be directed.

File:DETAIL SHOWING GRILLE, AND CONTROL FOR AIR DUCT, FIRST FLOOR, CENTRAL ROOM, EAST WALL - Montgomery County Courthouse (1891), Court House Square, Rockville, Montgomery County, MD HABS MD,16-ROCVI,4-18.tifGrille, and control for an air duct

A register differs from a grille in that a damper is included.[3][4] However, in practice, the terms "grille", "register", and "return" are often used interchangeably, and care must be taken to determine the meaning of the term used.[4][5]

## See also

* Register (air and heating)

## References

1. ↑ "Grille, Grill, n." def. 1.a. Oxford English Dictionary Second Edition on CD-ROM (v. 4.0) © Oxford University Press 2009
2. ↑ Chisholm, Hugh, ed (1911). "Grille". Encyclopædia Britannica. 12 (11th ed.). Cambridge University Press. p. 596.
3. ↑ Sugarman 2005, p. 132. sfn error: no target: CITEREFSugarman2005 (help)
4. ↑ 4.0 4.1 Haines & Wilson 2003, p. 129. sfn error: no target: CITEREFHainesWilson2003 (help)
5. ↑ Dearborn Home Inspection 2003, p. 80. sfn error: no target: CITEREFDearborn_Home_Inspection2003 (help)

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Heating, ventilation, and air conditioning

Fundamental concepts|

* Air changes per hour
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Technology|

* Absorption refrigerator
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Components|

* Air conditioner inverter
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Measurement
and control|

* Air flow meter
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Professions, trades,
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* Architectural acoustics
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Industry organizations|

* ACCA
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Health and safety|

* Indoor air quality (IAQ)
* Passive smoking
* Sick building syndrome (SBS)
* Volatile organic compound (VOC)

See also|

* ASHRAE Handbook
* Building science
* Fireproofing
* Glossary of HVAC terms
* World Refrigeration Day

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