Cartridge Filter, Filter Type Reusable Cartridge Filter, Filter MERV Rating 15, Compatible Extractor Manufacturer Part Number CF5, S220, End Cap Configuration Open/Closed, Features 95 Percent Maximum Humidity, Fire Retardant Additive, Nanofiber Pulse Layer, Filter Area 236 sq ft, Filter Efficiency 35 Percent, Filter Media Cellulose Polyester Blend, Inside Diameter 17.9 in, Outside Diameter 22.4 in, Overall Height 14 in