PLTD FILTER STD CAP 20X25X2* Pre Pleat 40 extended surface pleated filters are designed to operate in most types of installation. These fi lters have an average atmospheric dust spot efficiency range of 25-30% per ASHRAE Standard 52.1 test methods. These filters offer greater efficiency and service life than disposable filters pad and frame systems or met al washable filters. Operating face velocity ranges are from 0 to 500 fpm for 2"" filters. Pre Pleat 40 filter s are UL 900 Class 2 listed. Merv 8. Priced each Sold in case quantities only Media Maximizing v-pleat desig n Expanded metal grid prevents media flutter while in operation Diagonal and horizontal support members prot ect frame strength Filter media pack is sealed to eliminate air bypass Made of High-loft non-woven cotton s ynthetic blend Frame is made of moisture resistant carrier board