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The PREpleat M11 SC pleated panel filter enables a significant upgrade in collection efficiency over existing MERV 8 products. A 25-30% average efficiency filter can be upgraded to 60-65% efficiency at roughly the same resistance levels, when this filter is utilized.MERV 11 Ultra-high performance media with electrostatically enhanced fibers.,100% Recyclable synthetic high-loft media.,Diagonal grid support and expanded metal backing contribute to overall strength of construction.,Moisture-resistant clay coated frame.,High efficiency with a low pressure drop.