ventilating fan energy saving,economical,durable widely used for workshop, greenhouse, poultry house Ventilating fan Airflow: 30000 m³/hPressure:300 paOutput:3KWVoltage/ frequency: 380V /50HzAir speed:1speedWater consumption: 25-35(L/h)Noise: 81 (dBA)Dimension:1300×1260×1460Dropper Dimension: 760×760Net Weight:115 kgOperating Weight:180kgcovering area: 250-300 m2