Max cfm: 420/713m³h @ 0.1 sec contact time Recommended Min Airflow: 210 cfm Prefilter: Optional Flange: Optional, 6"& 8" Dimensions: (with pre-filter) ·Outside Diameter: 420mm/16.5" ·Height: 500mm/19.7" ·Carbon Weight: 18kg/39.6lbs. ·Carbon Bed Depth: 65mm/2.56" Max Operating Temp: 80ºC Pressure drop at max cfm: 100pa/ .40wg