Pressure Ventilation Blower Blade Diameter 18 in Color Yellow Gray Free Airflow 8748 cfm Full Load Current 13.4 A Hazardous Location Class Class I Group C D Class II Group F and G Maximum Airflow 8748 cfm Motor Enclosure Explosion Proof Motor Horsepower 1 hp Motor Speed 1750 RPM Nameplate Voltage 110 V AC Number of Speeds 1 Overall Depth 21 in Overall Height 24 1/4 in Overall Width 22 in Power Source Electric