Supply Ventilator Centrifugal Belt Drive 2485 CFM @ 0.250-In SP 20 Sones @ 0.250-In SP Mounting Location Wall/Roof Housing Height 30 In Housing Length 30 In Housing Width 52 In Base Width 28 1/2 In Base Length 28 1/2 In Motor Voltage 208-220/440 3 Phase Motor HP 3/4 Fan RPM 990 Wheel Dia 11 1/8 In Discharge Length 11 3/8 In Discharge Width 13 3/8 In Bearing Type Sleeve Requires Roof Curb For New Installations Includes Washable Aluminum Filters