Review on 🌬️ Flintar C545 True HEPA Replacement Filter S for Winix C545 Air Purifier - Replaces Winix S Filter 1712-0096-00: H13 Grade HEPA Filter + Activated Carbon Filters (1-Set) by Joseph Harkins

These "S" size filters for the Winix C545 Air Purifier (sold at Costco) are very hard to find. When I found 2 packs of these filters from Flintar, I bought them straight away. Shortly after the purchase, Costco finally decided to sell the S-size Winix filter for $44 each. I decided to buy one to compare to the Flintar brand. Winix and Flintar replacement filters also include 4 activated carbon pre-filters. Both brands of filters will likely get the job done, but when I installed them I found the Flintar filter to be a bit loose. However, the Winix filter fits like a glove. In this case I believe an OEM replacement filter is better. If the Flintar filter was a tighter fit and cost less I would probably give it 5 stars.