The pleated panel filters equipped with 100% polyester media meet the efficiency from 30% to 35% under ASHRAE 52.1 standard which also reach the capturing rate 90%-93% due to weight measuring standard. The 1 inch and 2 inches filters deal with the velocities up to 500 FPM, the 4 inches filters can hold up to 625 FPM. The filter frame is for heavy-duty, moisture resistant, which will not be cracked or twisted under normal operating conditions. The media pad is bonded to every part of the frame, preventing any leakage.
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