#1
Alen
75i
91 positive 0 neutral 15 negative
Based on 106 Reddit mentions
$749.00
Buy on Amazon
We may earn a small commission.
Most discussed features
Sentiment summary across the product areas Reddit users mention most.
Reddit mentions
Original Reddit posts and comments behind this analysis.
Which air purifier is the quietest at level I (not sleep mode) for ~380 sqft family/home theater room?
Yup, I found the same thing with my Winix 5510: it's only non-intrusive on night mode, which only gives 56 CFM. At 380 ft^2, and assuming 8' ceilings, you need 253 CFM to give you 5 ACH. There's no single air purifier that delivers that quietly (the Smart Air Blast Mini Provides 272 CFM on speed 1,
...theorist9 in r/AirPurifiers
May 29, 2026 7:58 PM
2
Redditors compare it with
Alen 75i vs Alen BreatheSmart 75i 82 Reddit comments and posts discuss both
Alen 75i vs Blueair Blue Signature 27 Reddit comments and posts discuss both
Alen 75i vs Dyson Purifier Big+Quiet Formaldehyde BP03 21 Reddit comments and posts discuss both
Alen 75i vs Coway ProX 14 Reddit comments and posts discuss both
