#1
Blueair
Blue Pure 511i Max
10 positive 0 neutral 4 negative
Based on 14 Reddit mentions
$139.00
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Most discussed features
Sentiment summary across the product areas Reddit users mention most.
Reddit mentions
Original Reddit posts and comments behind this analysis.
Filter turning black after a day
We use the Blueair 511i air purifiers set to auto 24/7. The filter will need to be changed about every 7 or 8 months. We have been very happy with them.
No_Beginning2044 in r/CPAP
January 31, 2026 3:11 AM
1
Would an Air Purifier help solve this problem?
Yes, an air purifier would definitely help in the bedroom, but it must have one that uses carbon filters, not just HEPA ones. Price wise, since the room is only 121 sq. ft., you can go with a smaller room air purifier, but the most inexpensive ones may not work that well in a smoky room. I would sug
...Blowingleaves17 in r/AirPurifiers
February 5, 2026 8:12 AM
1
