Air cleaner

An air filter is a device which removes contaminants, often solid particulates such as dust, pollen, mold, and bacteria from air. Air filters are used in application where air quality is important, notably in building  ventilation systems and in engines, such as internal combustion engines, gas compressors, diving air compressors, gas turbines and others.
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Noun
1. a filter that removes dust from the air that passes through it
(synonym) air filter
(hypernym) filter
(hyponym) filter tip
(part-holonym) ventilator