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Filter element definition9/22/2023 ![]() The filter could be vacuumed and washed prior to installation.Ĭlogged or dirty cabin air filters can significantly reduce airflow from the cabin vents, as well as introduce allergens into the cabin air stream. A long, thin rubber seal plugged the slot when the filter was installed. The filter was removed and installed from the engine compartment through a slot in the firewall. The filter was an aluminum frame containing an aluminum mesh and was located directly above the heater core. Ī reusable heater core filter was available as an optional accessory on Studebaker models beginning in 1959, including Studebaker Lark automobiles (1959-1966), Studebaker Gran Turismo Hawk automobiles (1962-1964) and Studebaker Champ trucks (1960-1964). The first automaker to include a disposable filter to keep the ventilation system clean was the Nash Motors " Weather Eye", introduced in 1940. Others are uniquely shaped to fit the available space of particular vehicles' outside-air intakes. Some of these filters are rectangular and similar in shape to the engine air filter. The cabin air filter is typically a pleated-paper filter that is placed in the outside-air intake for the vehicle's passenger compartment. The two most common standards require that an air filter must remove (from the air that passes through) 99.95% (European Standard) or 99.97% (ASME standard) of particles that have a size greater than or equal to 0.3 μm. ![]() Varying standards define what qualifies as a HEPA filter. ![]() The filter must satisfy certain standards of efficiency such as those set by the United States Department of Energy (DOE). Filters meeting the HEPA standard have many applications, including use in clean rooms for IC fabrication, medical facilities, automobiles, aircraft and homes. High efficiency particulate arrester (HEPA), originally called high-efficiency particulate absorber but also sometimes called high-efficiency particulate arresting or high-efficiency particulate arrestance, is a type of air filter. 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. Oil bath filters have fallen out of favour aside from niche uses. The air intakes of internal combustion engines and air compressors tend to use either paper, foam, or cotton filters. Another method, air ionizers, use fibers or elements with a static electric charge, which attract dust particles. 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. Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also remove odors and gaseous pollutants such as volatile organic compounds or ozone. JSTOR ( May 2009) ( Learn how and when to remove this template message)ĭiagram of a HEPA (high-efficiency particulate air) filterĪ particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air. ![]() Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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