DAYTON 7A704 Exhaust Vent,21 1/4 In Exhaust Ventilator, Centrifugal Upblast With Drive Package, CFM @ 0.000-In SP 5400, @ 0.250-In SP 4958, 17.7 Sones @ 0.250-In SP, Roof Mounting Location, Base Width 30 In, Base Length 30 In, Overall Height 36 1/2 In, Max. Inlet Temp. 300 Deg. F, Motor Voltage 208-220/440, 3 Phase, Motor 1 HP, 960 RPM, Wheel Dia 21 1/4 In, Application General/Kitchen, Includes NEMA 1 Junction Box