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

Worth every penny. Room always smells fresh, filters are easy to install. You know when it needs replaced when it takes on a copper color. Bare in mind, these units work WELL meaning they do collect A LOT of pet fur and hair. Keep this in mind if you are a pet owner. If your pet sheds a lot, you will have to vacuum the front and back of the first filter daily. If you do this these HEPA filters will last much longer and the fan speed won't ramp up as often if in auto mode. The color light indicator is nice, but I trust visual inspection more than the sensor when it comes to knowing when to change the filter. Great filters, great device.

I have the air purifier for these filters and always keep them on hand. I made this last purchase the other week during their big sale. Don't remember what Amazon calls this July sale. So, yes, they were on sale, so bought again. These work well as my house is normally dusty and has helped a lot!!

Fit my Winix 5500 Plasmawave Air Purifier perfectly! Good price, too! Highly recommend!

I saw some comments saying that it was thinner than previous filter versions, so I bought one from Amazon and one from the actual Winix website. In the first pic the Amazon one is on left, the filter I removed is in the middle, and the Winix on right, and all three are same thickness and quality. Cheaper on Amazon though. Anyway love this purifier and it works excellently. Also last pic is how I kept my cats from jumping on it and turning it off! Just buy some cat-proof walking material and tie it to front folding panel using fishing wire through one of the many holes on the front panel.

There are five carbon filters which are sheets, they are not the same as in the original product where the carbon filter was enmeshed in a plastic grid. The original filter lasted a long time, not sure how long this will last. The carbon sheet filter sheet needs to be trimmed. The HEPA filter is little big, but can be squeezed in

Great filter and perfect fit

Best machine we have which pets and living jn the desert keeps the hair and dust down great design easy to use, noise is a bit loud like whit noise, built strong, no smells and works unbelievable well. Still have and will continue to get more filters.

Perfect works great cleans the dust out of 3 of my rooms