To choose the best air purifiers from the hundreds on the market, I looked at several important factors. Air change per hour (ACH) is one measure to check, as it determines how many times the air purifier can filter the air in a room in one hour.
I also considered how powerful the best air purifiers are, especially to determine what room size they’re better suited for. Many air purifiers, like the Levoit models, can clean almost any room, and they’ll just take longer to finish the work for larger rooms. Other more compact options, like the Toshiba air purifier or the LG PuriCare Mini, don’t have the most powerful motors, so they’re more efficient in smaller spaces.
Besides size and ACH, the incorporation of HEPA filters was an important deciding factor. Short for high-efficiency particulate air, it’s a pleated mechanical air filter that can remove airborne particles as small as 0.3 microns. This covers 99.97% of the particles found in the air, including pollen, mold, dust, and bacteria.
Other factors I took into account include design, price, personal experience, and customer reviews.
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