Germany NORD motor Aluminum Alloy Hub 3 Years Warranty Place of Origin: China Certificate: CE MOQ: 1PC Unit Price:$2000 to $2500 Delivery: Within 8 days after order confirmationDetailed SpecificationsModelSYD48Fan Diameter4.8M (16FT)Airfoil MaterialAluminum AlloyAirfoil FinishesPlastic SprayingWeight116KGHeight1.1M (3.3FT)Number of Airfoils6PCSController includedYesVoltage220V/380V/415VFrequency50HZ/60HZRPM(min/max)20/55RPMPower1.5KWCoverage area800M²Warranty3YearsProtectionIP55Working Principle in Summer In summer, SIYI industrial size fans rotate in forward direction to drive mass amounts of air to ground so as to make people feel that breeze is moving across his skin.  The cool moving air breaks up the moisture-saturated boundary layer (also known as sweat) surrounding the body and accelerates evaporation to produce a cooling effect. Our Cases