This Vent-Axia Silent Extractor Fan offers a quiet and efficient solution for bathroom ventilation. It features an axial flow design for optimal air movement and is operated via your bathroom light switch to swiftly extract excess humidity. The fan is Zone 1 rated for safe installation in moisture-prone areas and offers versatile mounting options including recessed wall or ceiling installation, in portrait or landscape orientation. It is equipped with a high-efficiency, long-life motor rated for up to 40,000 hours with variable speed adjustment. The fan operates at an ultra-quiet 12 dB with a robust extraction rate of 54m³/hr. It is IPX5 rated for protection against water jets and includes back draught shutters. The fan is also compliant with UK electrical safety standards and Building Regulations approved for Document F and L. It has a 100mm ducting connection size. Technical Specifications: Height: 159mm, Width: 159mm, Overall Depth: 121mm, Protruding Depth: 38mm, Fan Size: 100mm (4 inches), Max Flowrate: 22 Lts/sec, Fan Speeds: 2, Control Type: Standard, Mounting Location: Wall & Ceiling, Fan Shape: Square.