Specifications include, but are not limited to: The Contractor shall replace HVAC filters as specified below. Filter Specifications Construction: The filters shall consist of a self-supporting pleated media pack contained in a die cut beverage board frame. Media: The media shall consist of 100% synthetic fibers Media pack: The media shall be formed into uniformly shaped pleats with equal height measured from pleat apex to apex. The media pack shall be self-supporting, without the use of metal backing. The media pack shall maximize surface area to ensure adhesion with the stabilizer support straps and die cut diagonal support straps. The media pack and die cut frame shall be equal to completely seal the pack inside the filter. The edges of the pack shall be roughed to allow complete adhesion to the frame. Filter frame: The pleated media pack shall be contained in a frame made from a single-piece of die cut beverage board with wet-strength characteristics. The die cut frame shall fully overlap around the entire perimeter of the filter. Diagonal support members shall provide support for the media pack on the air-leaving side. The die cut frame shall interlock in the corners, providing additional strength and rigidity. Media Pack Adhesive: The entire inside surface of the die cut frame shall be coated with a water-repellent adhesive to bond the pack inside the frame on all four edges. The pleat tips shall be bonded to the diagonal support members at all points of contact on the air leaving side. The adhesive shall be water-repellent and maintain its bonding characteristics when wet. The adhesive shall not soften or dissolve when the filter is wet
