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  2. National Advertising Division Finds Certain HEPA Claims for ...

    lite.aol.com/tech/story/0022/20241023/9261153.htm

    The challenged HEPA claims appeared on PuroAir 400 packaging, Amazon storefronts, and PuroAir webpages. The National Advertising Division (NAD) has noted in previous cases that, in the U.S., HEPA is generally defined as a filter’s ability to capture 99.97% of airborne particles that are 0.3 microns in size.

  3. Air purifier - Wikipedia

    en.wikipedia.org/wiki/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.

  4. The best air purifiers of 2025 - AOL

    www.aol.com/lifestyle/best-air-purifiers...

    We put the best air purifiers from Lenovo, Honeywell, Winix, and more to the test to see which held up best (and actually purified the air for you). See what our product scientist has to say.

  5. Superior Air Parts XP-400 - Wikipedia

    en.wikipedia.org/wiki/Superior_Air_Parts_XP-400

    The Superior Air Parts XP-400 is an aircraft engine, designed and produced by Superior Air Parts of Coppell, Texas, United States for use in homebuilt aircraft. [1]The company is owned by the Chinese company Superior Aviation Beijing, which is 60% owned by Chairman Cheng Shenzong and 40% owned by Beijing E-Town, an economic development agency of the municipal government of Beijing.

  6. Nextant Aerospace - Wikipedia

    en.wikipedia.org/wiki/Nextant_Aerospace

    Nextant 400XT Exterior. The company's first product is the Nextant 400XT, a modified and modernized Beechjet 400A/XP that sells for approximately one-half the price of competing models with comparable features and specifications.

  7. Pontiac V8 engine - Wikipedia

    en.wikipedia.org/wiki/Pontiac_V8_engine

    Hewing to GM's standing edict limiting engine size to 400 cu in for its midsize and smaller cars, the 360 hp (268 kW) (underrated), [citation needed] the 400 cubic inch Ram Air V-8 was the most powerful and advanced option available in the 1967 GTO and Firebird. Its cast "670" heads had taller valve spring heights than the standard D-port heads ...

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