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  2. The best air purifiers of 2025 - AOL

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

    One of tallest (nearly 24 inches) and heaviest (17.5 pounds) air purifiers tested, the Winix 5500-2 Air Purifier is ideal for small-to-medium rooms (up to 360 square feet), with a True HEPA filter ...

  3. Do Air Purifiers Actually Work? Here's What Experts Say - AOL

    www.aol.com/air-purifiers-actually-heres-experts...

    Every model included in the Good Housekeeping Institute's rigorously tested guide to the best air purifiers you can buy has a true HEPA filter. The air purifier's fan draws air into the filter and ...

  4. HEPA - Wikipedia

    en.wikipedia.org/wiki/HEPA

    Generally, washable true HEPA filters are expensive. A high-quality HEPA filter can trap 99.97% of dust particles that are 0.3 microns in diameter. For comparison, a human hair is about 50 to 150 microns in diameter. So, a true HEPA filter is effectively trapping particles several hundred times smaller than the width of a human hair. [33]

  5. Powered air-purifying respirator - Wikipedia

    en.wikipedia.org/wiki/Powered_air-purifying...

    In healthcare, a product known as the Racal suit can be used, consisting of a plastic suit and a PAPR fitted with HEPA filters. They were used by the U.S. Army Aeromedical Isolation Team to perform medical evacuations of patients with highly infectious diseases. [12] [13]

  6. 6888th Central Postal Directory Battalion - Wikipedia

    en.wikipedia.org/wiki/6888th_Central_Postal...

    Private Ruth L. James at the gates of the battalion's facility in Rouen during a 1945 "open house" attended by hundreds of other African American soldiers Second Lieutenant Freda le Beau serving Major Charity Adams a soda at the opening of the battalion's snack bar in Rouen 6888th Central Postal Directory Battalion African-American WACs, Hull & Cambridge, England, 04/14/1945

  7. Honeywell 6000 series - Wikipedia

    en.wikipedia.org/wiki/Honeywell_6000_series

    The Honeywell 6000 series computers were rebadged versions of General Electric's 600-series mainframes manufactured by Honeywell International, Inc. from 1970 to 1989. Honeywell acquired the line when it purchased GE's computer division in 1970 and continued to develop them under a variety of names for many years.