... 23-3/8 X 23-3/8 X 11-1/2 HEPA AIR FILTER. with clapboard /creating a better air ,and better life ... temperature resistance,Each Filters will be testing before shipments.AIR FILTER, HEPA MICROFIBER, DOP EFFICIENCY: 95 %, ACTUAL HEIGHT: 23 3/8 IN ... : 1900 CFM, INITIAL RESISTANCE: 1.0 IN WC, FINAL RECOMMENDED RESISTANCE: 2.0 IN, MAXIMUM TEMP: 200 F, AGENCY COMPLIANCE UL CLASSIFIED ...