Sloppy wide furnace filter slot

How to change your air handler or furnace disposable filter metal furnace filter slot cover Even though it's sized correctly, we still cover the filter perimeter with blue painters tape The ideal would be to bend up a metal cover, I' metal slot wallet 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

metal furnace filter slot cover The built-in magnets attach Filter Lock to metal duct work and hold it securely in place out of 5 stars Filter Lock Furnace Filter Slot Cover Review -