Air Purifier Glossary: Q-Z
A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z
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Radon A colorless, odorless gas, created by the decay of underground uranium.Radon can seep into basements and crawl spaces, causing a serious health issue, where rocks below contain uranium.
RPMRevolutions Per Minute (RPM) is a measure of speed for rotating fans and motors.
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Source CaptureA product intended to collect pollutants directly at the source. Commonly used for industrial air quality control, but the best method of dealing with cigarette smoking emissions that cannot be taken outside.
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ULPA Acronym for Ultra Low Penetration Air (filter.) A filter standard requiring retention of 99.999% of particles in the very small 0.01 to 0.02µm size class. Because ULPAs are very restrictive of airflow, they are for exacting industrial applications, not an improvement over HEPAs for household uses.
UV Acronym for Ultraviolet radiation, often called "light," UV is used in air cleaners as an anti-microbial agent and as an energy source for photocatalytic oxidation.
Ultrafine Particles Particles approximately 0.02 to 0.1 micron. These are the pollutants we buy air cleaners to collect, despite the industry norm of focusing on much larger visible dust. Ultrafines can penetrate deep into the lungs and enter cells where they can reside permanently.
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VOC Acronym for Volatile Organic Chemical. These can evaporate from common household products. At issue are the long term health effects of exposure to low levels of these common chemicals.
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Washable Carbon Filter An activated carbon gas/odor filter used in some in Sharp Plasmacluster air purifiers that is contained in a bag.This allows washing, extending the life of the carbon adsorbent.
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Zeolite Zeolite is a clay mineral which can be used as less costly adsorbent media in gas/odor filter cartridges.Zeolite filters are very sensitive to moisture.
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