Device composed of fibrous or porous materials which removes solid particulates from the air
"Air cleaner" redirects here. For a device which removes contaminants from the air in a room, see Air purifier.
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Diagram of a HEPA (high-efficiency particulate air) filter
A particulate air filter is a device composed of fibrous, or porous materials which removes particulates such as smoke, dust, pollen, mold, viruses and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also remove odors and gaseous pollutants such as volatile organic compounds or ozone.[1] Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines.
Some buildings, as well as aircraft and other human-made environments (e.g., satellites, and Space Shuttles) use foam, pleated paper, or spun fiberglass filter elements. Another method, air ionizers, use fibers or elements with a static electric charge, which attract dust particles. The air intakes of internal combustion engines and air compressors tend to use either paper, foam, or cotton filters. Oil bath filters have fallen out of favour aside from niche uses. The technology of air intake filters of gas turbines has improved significantly in recent years, due to improvements in the aerodynamics and fluid dynamics of the air-compressor part of the gas turbines.
^"California Environmental Protection Agency - Air Cleaning Devices for the Home, Frequently Asked Questions" (PDF). California Environmental Protection Agency Air Resources Board. Retrieved 2016-12-14.
A particulate airfilter is a device composed of fibrous, or porous materials which removes particulates such as smoke, dust, pollen, mold, viruses and...
particulate air) filter, also known as high-efficiency particulate absorbing filter[citation needed] and high-efficiency particulate arrestance filter, is an...
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which filter all the air going into a clean room, must be arranged so that no air bypasses the HEPA filter. In dusty environments, a HEPA filter may follow...
respirators: the air-purifying respirator, in which respirable air is obtained by filtering a contaminated atmosphere, and the air-supplied respirator...
ventilating, and air-conditioning (HVAC) system. An air handler is usually a large metal box containing a blower, furnace or A/C elements, filter racks or chambers...
published to ensure that the gas is safe. It may also be necessary to filter the intake air, to remove particulates, and in some environments it may be necessary...
An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Their chief use is in internal-combustion...
pollen filter. The air flow through the pollen filter leads to an increasingly poor air quality inside the vehicle. Especially in overloaded filters that...
A fan filter unit (FFU) is a type of motorized airfiltering equipment. It is used to supply purified air to cleanrooms, laboratories, medical facilities...
A fuel filter is a filter used to screen out foreign particles or liquids from the fuel. Most internal combustion engines use a fuel filter, in order to...
had all the particles of a given size distribution removed. For airfilters that have air flowing through them, it is the fraction of particles (of a particular...
maybe derived from Thurman's blown-air design, relied upon just suction with air pumped through a cloth filter and was offered as part of his cleaning...
often a high-efficiency particulate air (HEPA) filter is impractical in residential central heating, ventilation, and air conditioning (HVAC) systems due...
filter, a filter-cleaning system, and a dust receptacle or dust removal system. It is distinguished from air purifiers, which use disposable filters to...
full throttle. The most basic cold air intake consists of a long metal or plastic tube leading to a conical airfilter. Power may be lost at certain engine...
integrated filtration company engaged in the production and marketing of airfilters used in a variety of industry sectors, including commercial/industrial...
Compressed airfilters, often referred to as line filters, are used to remove contaminants from compressed air after compression has taken place. When...
source of fresh air. The source of this fresh air is the "crankcase breather", which is usually ducted from the engine's airfilter or intake manifold...
mechanical impact of fast-moving air on the microphone from plosives during recorded speech and singing. Pop filters can also keep saliva off the microphone...
use. Some masks have one or two compact airfilter containers screwed onto inlets, while others have a large air filtration container connected to the gas...
units a "fail" because they have a low clean air delivery rate (CADR). CADR measures the amount of filteredair circulated during a short period of time,...
A coffee filter is a filter used for various coffee brewing methods including but not limited to drip coffee filtering. Filters made of paper (disposable)...
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