Enter the size filter you would like to purchase. Length and width must be in inches.

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When measuring for filter size, be sure to consider that all of the air entering or leaving any area should pass through the filter. If a filter is cut too small, air will bypass the filter and compromise the efficiency of the equipment operation. The proper time to change a filter is when the static pressure across a filter has exceeded the point in which the fan can no longer effectively overcome it. This point is determined by many factors and is best left to the professionals.