99.97% 1100 CFM HEPA Filter for Aercology 1B 2226-04, 222604. Guaranteed to fit and perform in Smokebuster units. 23.3x23.3x11.5 inches in size, with CARB compliant MDF frame. 99.97% HEPA Filter 23.3 x 23.3 x 11.5 Inches Exact CARB Compliant MDF Frame Guaranteed Fit and Performance Used in Aercology Smokebuster 2000/2500 Replaces Aercology 1B 2226-04, 1B222604, 222604 Will not fit FD/MD units Filtra-Systems Micro-Cell HEPA filters filters are designed to meet critical filtration requirements in the most sensitive applications. Micro-Cell HEPA filters are constructed using ultrafine wet-laid microglass filter media and corrugated aluminum pleat separators. Micro-Cell HEPA filters are recommended for use in medical facilities, pharmaceutical mfg., food processing, microelectronics mfg., and nuclear or biological applications. *NOTE: Brand names are used for identification purposes only, and are the intellectual property of the OEM. Filters are OEM Replacements manufactured by Filtra-Systems and are not OEM Brand products unless specifically stated as such. Filtra Supply is not related to the OEM.