Confined Space Centrigual Blower Height 15 in Length 15 in Width 15 in Duct Diameter 8 in Engine Brand Briggs Stratton Includes SV-CUP Kit Blower/Fan Speed 3 000 RPM Horsepower 4 hp Maximum Flow in Free Air 3 000 cfm Run Time 2.5 hr Standards CAL-OSHA Approved Gasoline Engine Color Gray Fuel Type Gasoline Material Steel