The Industrial Fans by Schwank: GD series HVLS fan, geared-drive motor, 16' diameter, 80 RPM, 127,033 CFM, 62.7 dBA, 140' max affected area, 1.5HP, 939W, 208-240v/400-480v/50/60hz/3-ph ( Schwank - MF-GD16-XX )