FilterLOCK Furnace and Air Conditioning Filter Seal

: FilterLock seals one inch furnace and AC filter slots to improve indoor air quality and reduce utility bills Cover for furnace filter Cover for filter slot

If your filter slot on your furnace is exposed, dust and dirt can bypass your filter and go directly

filter slot I've considereddone blowing my rear fans inward across my CPUNorthbridge and putting filters on the outside of them, to PCI slot covers

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