Product Detail Ceiling-mounted commercial air cleaner with 2 heavy-duty commercial cells Removes up to 92-percent of airborne particles down to 0.5 micron 2 pre-filters; Coanda airflow; 3-speed motor-driven fan; 1250 cfm at high speed LED indicators; adjustable discharge louvers; safety interlock switch Measures 29-1/4 by 29-1/4 by 12-3/4 inches; 1-year limited warranty . The "Honeywell F90A1001 Commercial Ceiling-Surface-Mounted Self-Contained Electronic Air Cleaner, Gray" is best product for you. We recommended Honeywell F90A1001 Commercial Ceiling-Surface-Mounted Self-Contained Electronic Air Cleaner, Gray