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  1. The 7 Best Air Purifiers of 2024 | Reviews by Wirecutter

  2. Best Air Purifiers (2024): HEPA, Portable, and Quiet | WIRED

  3. 浅谈HEPA过滤技术 - 知乎

  4. 必应徽标

    Hepa Filter Air Purifier的最新相关信息

  5. 9 of the Best HEPA Air Purifiers & How to Choose - Healthline

  6. Best air purifiers in 2024 tested and rated | Tom's Guide

  7. The 4 Best Air Purifiers - Spring 2024: Reviews - RTINGS.com

  8. Xiaomi Smart Air Purifier 4 - Xiaomi Global Official

  9. Best Air Purifiers of 2024 - Consumer Reports

  10. Best Air Purifier of 2024 - CNET

  11. The Best Air Purifiers for 2024 | PCMag

  12. 其他用户还问了以下问题
    What is HEPA filtration?The filter technology is the result of an industrial need that became critical in the Atomic Age: high volumes of very clean air, vital for the production of microprocessors and other sensitive instruments. HEPA filtration is also fundamentally simple and cheap, which means it’s available to everyone today.
    How does a HEPA purifier work?Rather, in HEPA purifiers, a fan draws particles suspended in the air through a dense, felt-like filter that has billions of tiny gaps of varying size. Air passes through almost unimpeded—thus the “high-efficiency” in HEPA.
    How small is a HEPA filter?A HEPA filter can trap particles as small as 0.3 microns. For reference, the smallest thing the human eye can see is 25 microns, and a strand of hair is between 17 and 180 microns in diameter. When placed into filtration systems like air cleaners and purifiers, HEPA filters can remove 99.97 percent of particles from the air.
    Do air purifiers have HEPA filters?A number of devices use these filters, such as air purifiers, which are designed to remove a host of particles and pollutants from the air in your home. There is no federal certification or regulation for HEPA filters in the United States, but the Environmental Protection Agency offers some advice on how to choose efficient filters.