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Great article. I myself have IKEA air purifier.

Has anyone used https://www.mi.com/global/mi-air-purifier-3c ? Can it achieve lower noise per CADR? IKEA one on full speed is pretty loud (I may not know what loud air purifiers are, but I get concert of sounds at home I want to minimize - refrigerator, freezer, dishwasher, electric water boiler, air purifier)

Does it work via LAN with Home-Assistant? Are they "smart" filters you are forced to change or "dumb" ones?

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I have two Fornuftigs for bedroom and office, and a Winix Zero in the living room. The Winix definitely beats Ikea in terms of noise production on max airflow, it positively sounds like a jet is taking off. It moves quite a bit more air of course. I was rather surprised that the Fornuftig is nearly perfectly quiet at the lowest setting, which is really great for a bedroom and offce, although I don't know how much or little it stil does at that setting.

Mi does some (not so) secret (anymore) authentication trying to force users into buying their genuine replacement filters cartridges.

Recently there was an article on HN on how someone got around this. [1]

[1] https://news.ycombinator.com/item?id=31540394

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