Exhaust Fan, Industrial/Commercial Direct Drive, Propeller Dia. (In.) 24, CFM @ 0.000-In. SP 5703, Sones @ 0.000-In. SP @ 5 Ft. 17.9, Sones @ 0.125-In. SP @ 5 Ft. 15, Max. Ambient Temp. (F) 104, Voltage 115/230, 60 Hz, 1 Phase, Motor HP 1/2, Motor RPM 1140, Motor Enclosure Totally Enclosed Air Over, Motor Insulation Class B, Bearing Type Ball, Full Load Amps 4.9/2.5, Watts 373, Height (In.) 28, Width (In.) 28, Max. Depth (In.) 20, Venturi Depth (In.) 3-3/8, Flange Width (In.) 1 RestrictionsNote: OSHA-complying guards are required when a fan is installed within 8 ft. of floor, working level, or within reach of personnel. Review OSHA codes and UL standards. See Index under Guards, Fan. For recommended accessories, see Index under Shutters, Exhaust and Intake Guards. On DrillSpot.com , search by DrillSpot Item Number and click the Optional Accessories tab. Quiet-Design Direct-Drive Venturi Exhaust FansGalvanized frame and finish. For commercial and industrial applications.UL and C-UL Listed.Mount: vertical or horizontal Motors: totally enclosed air over, with Class B insulation Ball bearings 60 Hz Max. ambient temp.: 104 F Aluminum propellers