Exhaust/Supply Fan, Belt Drive Reversible, Less Drive Pkg, Propeller Dia 36 In, Max Inlet Temp 104 Deg F, Height 40 In, Width 40 In, Max Depth 22 In, Mounting Position Horizontal or Vertical, Propeller Material Cast Aluminum, Number of Blades 6 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. Reversible Belt-Drive Exhaust/Supply FansDesigned for commercial and industrial applications requiring both supply and exhaust air. Fans feature 6-blade cast-aluminum propellers and rigid drive-frame rails. Motor, sheaves, bushings, belts, and reversing switch are packed separately when complete fan with drive package is ordered. Air handling-quality bearings meet a min, of L10-100,000 hr.UL and C-UL Listed.Mount: vertical or horizontal Regreasable cast pillow block bearings Max. inlet/ambient temp.: 104 F Variable-pitch, adjustable motor pulley optimizes fan performance