Review on Enhanced Furnace Reduction with POPFRO 20X20X1 Filters by Jorge Maertz

These are filters with a strong cardboard frame, they don't curl or twist like the ones I've used before. On the other hand, the fan-shaped filter media is 1 inch thick, unlike some I've used with a 1 inch thin frame and 1/4 inch filter media. "Don't run my fan. We live in a rural, dusty area so the filters will most likely need to be changed monthly. So these 6 packs will last a year or more as we don't run central heating in the winter. So, now that's it everything is fine, the product is of good quality and it noticeably reduces the airborne dust in our house, thank you very much!