#1
Winix
9800
15 positive 0 neutral 1 negative
Based on 16 Reddit mentions
$239.99
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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.
Winix c909 or Medify air ma-25?
C909 all day long. It has a MUCH higher CADR (Clean Air Delivery Rate). The MA-25 is not comparable at all. I have several C909s in my classroom and office. They've been totally reliable and I think the C909 is one of the best bang for the buck air filters on the market. Plus, with Costco you get a
...paw_pia in r/AirPurifiers
October 9, 2025 9:48 AM
4
Confused between Winix C909 / 5520 / 5510
Yep. It's vaguely mentioned buried in all the text under the pictures. It doesn't say the charcoal ones but they were included as well. A "set" normally includes for the C909 one HEPA and four charcoals. WINIX Filter The C909 is basically the Winix 9800 but made for Costco. The grate is different in
...kidqwik in r/AirPurifiers
June 26, 2025 3:23 PM
2
