Fette Filter - 115115 Premium True HEPA H13 Filter Compatible with Winix Filter A 115115 Size 21 Plasma Wave Air Purifier AM90 P300 5300 5500 5300-2 6300-2 6300 C909 9800 C535 - Pack of 2 + 8

These are excellent and fit our Winix C535s perfect. I only wish I had remembered that the C535 takes 2 hepa filters so technically I should have bought 2 of the sets vs 1. Still a bargain considering even at Costco where they discount the OEM winix brand version of this filter, they charge $90 bucks for the same thing, and there really is no difference at all that I can see. It’s a high quality filter just like the original I tossed out after a years time. Will be ordering another for our second C535.

This is an easy product to install and maintain. And it seems to get the job done.

The filters I received fit perfectly. These HEPA filters fits snugly in the purifier opening, just like the Winix OEM filters fit. I have the washable, reusable carbon filter that came with my unit but I prefer these disposable carbon filters much better. No hassle, just replace.As for filtration, I do not know if these are certified true HEPA filters that filter down to 0.3 microns, but if it does what the box says it does, then these are good to go.I will definitely be purchasing more of these filters in the future.

The HEPA and Carbon filters are made well and very well priced. I have struggled matching up dimensionally on the HEPAs for an older 9500 air purifier we have had for ages. All are a bit too long from various merchants. But I cannot ding them too much. Overall I would give them 4.5 Stars.

Factory products fit great and easily to install

These are very good filters they do only last about a month and a half the charcoal ones anyway, The pre-filter is just a very fine mesh screen but it really does collect fine molecules of dust, The HEPA filter should last up to a year, (they say don’t clean it) but I have cleaned it once already, using a kitchen counter solvent actually I used (heavy duty Dawn spray for pots and pans) and it cleaned the filter really well, that was during the summer months, and I just left the filter sit outside in the air overnight to dry it, I’m sure in the winter months you could put it down on your heater in your basement to dry or if you have radiator heat you can put it on your radiator overnight.

Good product for a good price...

The air purifier filters have reduced the dust particles in our home

I've tried the other generic filters on amazon that come in the plain white box. Multiple listings sell the same ones for different prices which i found out the hard way. They all are less quality than the ones that came with the Winix. They let through about twice as much airflow which makes the purifier much louder even on low. Also to me more air flow means less filtration.These Fette brand ones let through the same about of airflow as the winix brand ones so the purifier stays its nice quiet volume on low. These filters actually feel a bit heavier and are slightly thicker too. They feel a but more sturdy. The carbon filters are also slightly thicker which must be a good thing. Despite them being thicker they still fit in the purifier perfectly. Highly recommend.

Bueno

Compared to oem filters from Winix, these filters are very restrictive and have poor airflow.