Inline Duct Booster, Housing Material Galvanized Steel, Fits Duct Dia. 5 to 8 in., Voltage 115, Max. Amps 0.51, Max. Wattage 40, Number of Speeds Length 7 in. CFM at 0.000 in. SP 275Max. Inlet Temp. 200°F, Inlet and Outlet Dia. 5 to 8 in., 60 Hz, 1 Phase Motor RPM 1550, Motor Enclosure Totally Enclosed, Width 9-1/2 in., Height 8-3/4 in. Speed Control Yes Mounting Position Horizontal Includes Mounting Template Restrictions Note: cfm rating is for 8 in. Dia pipe. Air flow will decrease slightly with smaller pipe. In-Line Centrifugal Fan Duct Booster fits in round, square, or flat ducts as shallow as 3-1/4 in. deep. One 4 in. x 7 in. cutout is required. Unit attaches to ductwork with 4 sheet metal screws. May be actuated by 5C968 pressure switch. Steel housing and wheel. 1/70 HP, 1550 RPM, 115-Volt, 60 Hz permanently lubricated motor is positioned out of the air stream. UL Listed. Max. operating air temp.: 200°F; not for use with combustion exhaust Motor shaft should remain horizontal to the floor; mount on bottom of horizontal or side of vertical duct.