Genuine Winix 115115 Replacement Filter A for C535, 5300-2, P300, 5300, White/Black

Replacement Filter for my air purifier came superfast and very easy to install. It was perfect.

Really like the filter pack which has both filters in it. Ready for another 6 months and Amazon will send the next box when needed!

good value

We got these portable filter units a couple years ago when we started getting a lot of wildfire smoke blowing around, and theyve worked just fine since getting them. Replacing the filters requires about twenty seconds worth of time total - hit the power button to turn off the unit, pull off the magnetically attached hard front cover, pull the little tabs on the permanent screen filter to pull it off, pull the tabs on the hepa filter and remove it along with the black charcoal filter, place the new hepa filter in place (make sure the air flow arrow points into the machine and not towards you), place the new black charcoal filter on top of the hepa filter, snap in the permanent screen filter, place the tabs on the hard front cover in their slots and rotate to engage the magnetic hasps, and finally hit the button to turn the unit on again. The filtration system works fine - we left the house for a weekend getaway and when we came back there was no noticeable odors in the house whatsoever. Remember to use the brush attachment on your vacuum to suck off the dust that accumulates on the permanent screen filter once every seven to ten days and itll work just fine.

Product was delivered when promised. This is a replacement filter for a Winix Air Purifier. Keeping one on hand seems like a good idea.

Works like it says and keeps me from having to dust furniture everyday!

Filter fits correctly and works as well as original filter. Will buy again.

They are pretty dirty when I change them, so they must be working

We have the Winix air cleaner, and this are the cheapest I can find anywhere........still kind of expensive for a paper filter and some carbon coated foam filters.........these fit and filter much better than the off brands we have tried. 2-22-2014: Just purchased a Fellowes HF-300 True HEPA Filter just to see if it would fit. PERFECT, in fact it is exactly the same as the Winix filter in size, materials, and construction (both have gotta be made by the same manufacturer). Price was half of that of the Winix filter, but the Winix filter comes with 4 carbon prefitlers (which cant be purcahsed seperately). The 4 Fellowes carbon prefilters can be purchased seperately for under $12.............still almost $20 cheaper total than the Winix.

The actual white filter looks and works fine. But the features of the filter, which are supposed to facilitate proper installation actually do the opposite: they confuse. People who made it either had QA problems or simply did know what they were doing. The horizontal top of the filter has an arrow that says FRONT, implying that this arrow is supposed to point towards the front of the device. At the same time the vertical sides of the filter have little tabs, which are supposed to help to pull the filter out of the device. But if you obey the top arrow, these side tabs will end up inside the device. This makes no sense. at all. I presume that the little tabs are supposed to face outside, towards the front. This implies that the arrow on the top was actually meant to be an AIRFLOW arrow. It is just that some incompetent genius mislabeled this arrow is as FRONT instead of AIRFLOW. Treat that top arrow as AIRFLOW direction, install this filer with little tabs facing outside and it will work fine.