AllergyZone FilterLock Furnace Filter Slot Seal

website metal furnace filter slot cover If you don't see such a slot, your furnace's air filter is accessed only by removing the furnace andor fan compartment cover metal plates These can metal slot wallet FWIW, filters do not fit tightly into the slot There needs to filter that doesn't completely cover the hole It's fine for it to

metal furnace filter slot cover FR20253-2SLOT BELVENT FILTER RACK 20 X 25 W 2 SLOT 2 FILTERS MFC2025 COVER FOR 3X20 FILTER RACK MAGNET MFC2025 COVER MFC2025  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  cover the filter slot on the side? or should I simply tape it with HAVC tape? Please tell me a bit detail about the cover

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