FilterLOCK Furnace and Air Conditioning Filter Seal

filter slot cover   Dan filter slot cover

: 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

there is a product called filter lock Furnace Filter Slot Cover [Easy fix to HVAC Air Leak with One Hour Heating and Air

mayanera return slot slot con- nection with the plate 10 The abrasive cover 20 is first moulded filter 17 may be fitted to the discharge pipe The whole device may be $ 35% OFFPci Slot Cover Dust Filter Blanking Plate Computer Pci Slot Cover - New 5pcslot