Furnace Filter Slot Cover: Easy Fix to HVAC Air Leak

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Hinged Air Returns - Return Air Vent Covers

Magnetically attaches to ductwork to cover furnace filter slot door Two-piece design works with any 1-inch furnace filter up to 25 inches long Universal one- The HVAC contractor argued and said that a filter cover was not required at this location and it would not hurt anything to leave it open He

dead alive slot Minimum 2 inch thick filter slots air filter is possible in this case Left side: air_ Right side: air_ It seems to me that if the width of the stand