Review on 🔍 Fette Filter 2-Pack of High-Quality HEPA Filters with 8 Carbon Replacement Filters – Compatible with Winix Filter A 115115, Size 21 – Plasma Wave Air Purifier 5300, 6300, 5300-2, 6300-2, P300, C535, AM90 by Tony Basler

Bought for two Winix 5300-2s. tight fit on the edges of the machine; My previously authorized filters required careful use of pull tabs. These filters didn't stay inside by themselves, but kept falling out because the edges of the binder weren't as strong as the original (generally the filter felt less harsh). Unfortunately, I couldn't get a good picture of small size differences between filters with my phone's camera. As I feel they should fit quite snugly on the car (fewer gaps) I have decided not to buy them again but have bought back the Winix filters and will be selling these third party filters for a (completely arbitrary amount) 6 Months of use before I replace them. While this was a good experiment, as I disagree with things like allergies I would have preferred confirmation of the filter's authenticity based on the fact that I found small but noticeable differences in the design. While I can't accurately measure whether one particle actually filters better than the other, or meets the claimed CADR with both, the normal annual filter cycle is a long time to wonder (and breathe).