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

PolarPro Helix Overview The Helix Peter McKinnon Edition 4-Slot Filter Case from PolarPro offers a storage and carry solution for up to four Helix MagLock

FilterLock satisfies the department of energy recommendation that the furnace filter slot be covered to avoid air leaks; Click here to learn more about Eco

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p77 slot We're All About Sealing Up Ductwork In the video above we explain a very easy simple tip to seal the space around your furnace filter slot