Blue Pure 511i Max

Medify MA-25 is stronger for smoke; Blueair 511i is only good for small rooms Any idea why the Blueair is more expensive than the Medify, though?

My spec is 511i and Amazon lists it as available however when I order it they give me the wrong one, they give me the 511 one which doesn’t fit my purifier. I have gone in person to blueair trusted sellers and they have also given me the wrong one

I just bought a blueair 511i Max because it's supposed to be the quietest and I'm underwhelmed. I bought it for a small living room to keep the air fresh and it seems to create a dusty odor instead? There's also an audible machine whir even on the lowest setting. I'm considering sending it back and

The sensors onboard almost all consumer-grade air purifiers are very cheap and inaccurate. For example, a good consumer-grade AQI monitor like the AirGradient ONE is approximately $230 USD or £173 (I'm just converting currency on my end; stockists in the UK may have higher prices). Outdoor AQI can c