... double-intake centrifugal fan. Air capacity: 20000m³/h. Power: 2×3kwExhaust fan: 1-set double-intake centrifugal fan ... . Air capacity: 18000m³/h. Power: 1×4kw Filtering SystemPrimary filter: Pre-filter, high ... time setting, emergency stop, limited-temperature device, lighting switch, power switch, etc. All components are from renowned manufacturers. Lighting ...