Tunnel Ventilation Fan, Axial Fan, Fan, Ventilator, Ventilation, Ventilating Fan, Ventilation, Ventilator Fan, Ventilation, Ventilator Fan, Air Mover Application: air ventilating and exhausting in subway, tunnel, mineral, mountain, Specification: 1) Type:horizgizontal reversible 2) Fan diameter: 1,250-2,800mm 3) Air volume: 35,000-750,000m³/h 4) Air pressure: 300-2000Pa.