Glossary
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The terms and definitions included
in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation,
Air Conditioning & Refrigeration".
To access the complete glossary please
visit ASHRAE's Bookstore.
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| bacteriostatic |
property of a substance capable of inhibiting
the growth of bacteria by causing bacteria to form aggregations, without
killing them. |
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| baffle | surface, usually in the form of a plate or wall,
used for separating spaces or deflecting fluids |
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| balancer | person or firm which performs testing,
adjusting, and balancing work on ventilation systems |
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| balancing station | assembly to measure and control fluid flow;
composed of a measuring device, a volume control device, and recommended
lengths of straight ductwork or pipe leading into and out of the measuring
device |
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| ballast | electrical device used with an
electric-discharge lamp to obtain the necessary circuit conditions (voltage,
current, waveform) for starting and operating |
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| ballast factor | ratio of commercial electric ballast lamp lumens
to a reference ballast lamp lumens, used to correct the lamp lumen output from
rated to actual |
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| ballast losses | electric power (watts) consumed internally by
the ballast components |
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| barometer | device for measuring atmospheric pressure |
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| barometric effect | variations in barometric pressure caused by
altitude or weather changes |
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| base unit power density (Pb) | maximum allowed power density, in W/ft2,
for the listed areas/activities of an ideal space prior to area factor
adjustment. |
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