Washable Pre-Filter - 9-1/8" X 11-3/8" X 1/4"
Check pre-filter every 3 to 6 months. Clean and/or replace when filters are visibly dirty.
The 1/4" washable pre-filter should not to be discarded. Inspect for debris, dirt, or other obstructions. Wash the 1/4" pre-filter every time the 1" pleated fabric filter is replaced. To clean the 1/4" pre-filter, remove filter from the unit, rinse the 1/4" pre-filter in water with the water flowing through the aluminum support mesh side. Allow the filter to dry completely before reinstalling.
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