Review on π¬οΈ Furnace FilterBuy 20X22X1: Powerful Pleated Filter for Enhanced Air Quality by Angelo Forrest
Turns black without use
The filter will turn black over time even if not used. I buy several filters at once and after a few months the filters stored in the closet turn dark gray or black without use. Not sure why this is happening. Other brands don't do this.
- Oven Filter
- Wrinkled
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