Product Detail Ductable or stand-alone air cleaner for commercial or light-industrial environments 3-stage filtration with prefilter included; main filters must be ordered separately 3-speed, direct-drive, forward-curve blower/motor circulates up to 2500 cfm Thermal circuit breaker; can be positioned to create negative or positive air pressure Measures approximately 26 by 48 by 26 inches; 2-year limited warranty . The "Honeywell F116A1120 Commercial Self-Contained Ductable 3-Stage Media Air Cleaner" is best product for you. We recommended Honeywell F116A1120 Commercial Self-Contained Ductable 3-Stage Media Air Cleaner