... . 2.Large airflow.Environmental, no freon. water curtain air cooling unitSpecificationAirflow:4000m3/h Power Supply:220V/50HZ Power ... and flexibilityBlower fan: new wind blades adopted, sufficient air quantity, high pressure, and effective noise inhibitionMotor: dust ... bearings equipped, and high safety and maintenance freeWet curtain: imported paper adopted, good water absorption, high evaporation ...