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  2. Air filtration in operating rooms - Wikipedia

    en.wikipedia.org/wiki/Air_filtration_in...

    High-efficiency particulate air (HEPA) filter is at least 99.97% effective in removing particles ≥0.3 μm in diameter (as a reference, Aspergillus spores are 2.5–3.0 μm in diameter). [3] High-level HEPA filtration and increasing air changes per hour (ACH) can reduce particulate matter (PM) and bacterial concentrations in the operating room ...

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

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

    Do air purifiers really work for dust, smoke, mold, allergies and more? ... D.O., an emergency medicine doctor with Redlands Community Hospital in ... Air purifiers that utilize HEPA filters can ...

  4. HEPA - Wikipedia

    en.wikipedia.org/wiki/HEPA

    HEPA (/ ˈ h ɛ p ə /, high efficiency particulate air) filter, [1] also known as a high efficiency particulate arresting filter, [2] is an efficiency standard of air filters. [ 3 ] Filters meeting the HEPA standard must satisfy certain levels of efficiency.

  5. 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 ...

  6. 9 Best Air Purifiers of 2023, According to Testing - AOL

    www.aol.com/9-best-air-purifiers-2023-142700612.html

    The best-rated air purifiers for your home and office that can actually help allergies by removing dust, smoke, pollen, pet dander and air pollution. 9 Best Air Purifiers of 2023, According to Testing

  7. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.

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