Airvent 431302 – 100mm/4" Low Profile Axial Fan With Timer & Backdraught ShutterSlim axial extract fan with backdraught shutter and electronic overrun timer adjustable from 3 minute to 25 minutes, the factory setting is 15 minutes. Suitable for panel mounting or wall mounting using the appropriate accessory kit. Key features: Slim only 15mm thick Suitable for wall or ceiling mounting High Quality ABS mouldings with external gloss finish Quiet Operation Adjustable overrun timer Backdraught shutter Specifications: Meets the