MINI-PLEAT FILTERS The MINI PLEAT Filter is a HEPA type filter, available in MERV 15, MERV 14, MERV 13 and MERV 11 efficiencies. Made with special media, designed to capture both large and small particles with minimum airflow restriction. Tightly pleated, this media has 5 times the surface area as the regular pleated filter. The increased surface area means better filtering capabilities and longer filter life. Designed for use in hospitals, air purifiers and computer clean rooms.