18 1. POMORON 4-IN-1 AIR IONIZER
If you want one unit that does more than just ionize, the POMORON 4-in-1 is the one I’d point to first. It combines negative ion output with an H13 true HEPA filter, UV purification, and an essential oil diffuser, and it’s built for rooms up to 1,250 sq ft. I also like that it has touch controls, multiple fan speeds, a quiet sleep mode, and useful timer settings.
Available on Geni
External purchase
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Consumer Sherpa