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