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  2. Purolator Inc. - Wikipedia

    en.wikipedia.org/wiki/Purolator_Inc.

    Website. purolator.com. Footnotes / references. [1][2] Purolator Inc. is a Canadian courier majority owned by Canada Post. It was founded as Trans Canada Couriers, Ltd and acquired in 1967 by Purolator, a US manufacturer of oil and air filters. [3] In 1987, the company returned to Canadian ownership. Although it retained the Purolator name, it ...

  3. Purolator Filters - Wikipedia

    en.wikipedia.org/wiki/Purolator_Filters

    A modern Purolator oil filter. The company was founded in 1923 as Motor Improvements, Incorporated in New York City. [1] The company's Purolator (initially stylized PurOlator and sometimes Pur-O-Lator) oil filtration device, [2] invented in 1922 by Ernest John Sweetland [3] and George H. Greenhalgh, [1] was standard equipment on early 1920s Chrysler automobiles after being launched on the ...

  4. Clean air delivery rate - Wikipedia

    en.wikipedia.org/wiki/Clean_Air_Delivery_Rate

    Clean air delivery rate. The AHAM-certified seal lists a rating for tobacco smoke, pollen, and dust removal, and a rating for room size. The clean air delivery rate (CADR) is a figure of merit that is the cubic feet per minute (CFM) of air that has had all the particles of a given size distribution removed. For air filters that have air flowing ...

  5. Air filter - Wikipedia

    en.wikipedia.org/wiki/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]

  6. Air purifier - Wikipedia

    en.wikipedia.org/wiki/Air_purifier

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

  7. Donaldson Company - Wikipedia

    en.wikipedia.org/wiki/Donaldson_Company

    Donaldson Company, Inc. is a vertically integrated filtration company engaged in the production and marketing of air filters used in a variety of industry sectors, including commercial/industrial (engines, exhausts, transmissions, vents in private vehicles, hydraulics), aerospace (helicopters, planes), chemical, alternative energy (windmills) and pharmaceuticals.

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