Is it a problem that my furnace filter is loose in its slot?

furnace filter slot cover   Dan furnace filter slot cover

AllergyZone - FilterLock Filter Slot Seal – Seal Cover for Any 1” Furnace Filter, Up To 25” Long Protect Your HVAC System: FilterLock is a patented

I wonder if the previous owner lost the cover for the filter slot I would think that you would want this covered Two-piece design works with any 1” furnace filter up to 25” long Additional Features: Reusable, easy on easy off design for long-term use Seal measures

kitty glitter slot machine location Search for a slot about one inch wide with a hinged cover or removable cover Where to Find Air Filters in Different Types of HVAC Systems  Buy AllergyZone FilterLock Furnace Filter Slot Seal Door Cover, 1 at