Overview Essential details Type:Axial Flow Fan Mounting:Wall Fan Blade Material:Stainless Steel Place of Origin:Fujian, China Voltage:380V,220V Warranty:1 Year After-sales Service Provided:Online support Application:Exhaust Ventilation Size:1380*1380*400mm Usage:Cooling System Certification:ce Keyword:Exhaust Cooling Fan Supply Abilityï¼?20000 Unit/Units per Month I. Cooling Fan Impeller Diameter(mm) 1250 Rotation(rpm) 392 Air delivery(m3/h) 44500 Power(kw)1.1 Weight(kg) 90 Noise(dB) â?¤65 Rating voltage(V) 380V/220V,3 phase Dimension(cm) 140*140*44 II -Cooling Pad The Pad is the core of cooling system. It is made of corrugated paper with special technique processing, corroding-resistant, higher wet strength and long life. III-Auto Controller The controller can calculate the current target temperature according the four different time period a day and corresponding temperature requirement. The process is as follows: Detect the indoor temperature------Calculate the difference between the current temperature and the target one------Obtain the cooling requirement value after further PI calculation------Control the work of Fan & Pad System.