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

Is Your Air Filter Too Small for Your AC or HVAC Unit? furnace filter slot cover FilterLock · Filter Products · Filter-Monster · AllergyZone FilterLock Furnace Filter Slot Seal furnace filter slot The size of your home, size of individual rooms and size of your HVAC filter slot can all come into play when it comes time to buy new air filters

pol 88 slot air filter and the two-piece system allows you to cover a filter slot up to 25 inches which is