Designed to provide ventilation or cooling in enclosures where excessive moisture or excessive internal heat is a problem. These kits are fabricated from 14 gauge steel and include all hardware for mounting. Kits are easily field installed by making a cutout of the proper size and attaching the louver plate in place. Finish is ANSI 61 gray polyester powder finish over phosphatized surfaces or 316 stainless steel. Filter kit must be ordered separately.