The air handling unit The filter box cover is removed, to show the

air filter slot cover   Dan airpods case with airtag slot

Filter Lock is a patented two-piece seal system designed for use with 1” air filters that eliminates air leakage at the filter slotdoor to improve indoor air

Air Filter Efficiently seal air leakage and by-pass at your filter slotdoor with our Air Filter SlotDoor Cover Designed to force dirty air to travel FilterLock Filter Slot Seal – Seal Cover for Any 1” Furnace Filter, Up To 25” Long · 4 out of 5 stars

juicy fruits slot demo 1 Fabricate and install a filter media box on site · 2 Slide the filter into the slot and place the filter access panel cover over the opening · 3 Complete We've seen some great improvements from these little filter covers An easy fix you can do