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An ventilate purifier or ventilate cleaner is a device which removes contaminants from the air in a room to affix indoor expose quality. These devices are commonly marketed as beast beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke.

The commercially graded ventilate purifiers are manufactured as either little stand-alone units or larger units that can be affixed to an expose handler unit (AHU) or to an HVAC unit found in the medical, industrial, and billboard industries. ventilate purifiers may also be used in industry to sever impurities from freshen back processing. Pressure oscillate adsorbers or other adsorption techniques are typically used for this.

Dust, pollen, pet dander, mold spores, and dust mite feces can case as allergens, triggering allergies in yearning people. Smoke particles and volatile organic compounds (VOCs) can pose a risk to health. freshening to various components such as VOCs increases the likelihood of experiencing symptoms of sick building syndrome.

Joseph Allen, director of the Healthy Buildings program at Harvard's speculative of Public Health, recommends that intellectual classrooms use an ventilate purifier with a HEPA filter as a showing off to condense transmission of COVID-19 virus, saying "Portables in imitation of a high-efficiency HEPA filter and sized for the invade room can seize 99.97 percent of airborne particles.

There are two types of ventilate purifying technologies, swift and passive. sprightly ventilate purifiers release negatively charged ions into the air, causing pollutants to stick to surfaces, even if passive let breathe purification units use expose filters to sever pollutants. Passive purifiers are more efficient before every the dust and particulate situation is each time removed from the let breathe and collected in the filters.

Several substitute processes of varying effectiveness can be used to purify air. As of 2005, the most common methods were high-efficiency particulate expose (HEPA) filters and ultraviolet germicidal irradiation (UVGI).

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