FilterLock Filter Slot Seal – Seal Cover for Any 1” Furnace Filter, Up

74846 Southwark FB Furnace Support Box with Filter Slot, 20 x 25 x 1 Inch, 21 Inch W x 18 -12 Inch H Ready To Ship! 17 In Stock Now! Check

Protect Your HVAC System: FilterLock is a patented two-piece seal system designed for use with 1” air filters that eliminates air leakage at the filter

return air support box with filter slot 38 x 28 x 15-38, Hot Dip Galvanized Steel, Return Air, Sheet Metal Duct Support Box 5908000 16 X 25 1 FILTER HOLDER · 5908000 16

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