4 Pack C545 Replacement HEPA Filter Compatible with Winix C545 , Ture HPEA Filter S Only, Part number 1712-0096-00

How can I tell the front from back? Last filter was marked with an arrow. This one is not marked.

Prefect work with C545 air cleaner.

Got my new filters today and went to install the hepa filter. Took out the original filter that came with our unit and it showed the air flow direction on the filter. When putting the new filter in the unit, it did not say which way for the air flow. Checked all 4 sides and none shown. Other than that it fits just right and well see how it does in time.

Cost less than named brand & works just as well!

These filters fit and work perfectly in our Winex.

Does what its supposed to do.

Easy installation perfect fit

I use these all of the time to keep our air circulation going all the time!

So easy and came so quicky

Ease of ordering, the correct item, fast.delivery, fits on air purifier, everything is great