• Material used for parts not recessed into wall: white ABS plastic. • Material used for parts recessed into wall: talc-filled black plastic (PP) giving added strength. • Nominal diameter 100 mm. • 2-speed EC (electronically controlled) brushless motor with shaft mounted on ball bearings and thermal overload cutout incorporated into pcb. • Minimum air flow 75 m3/h Maximum air flow 100 m3/h • Equipped with electronic timer designed to shut off the motor automatically after a set interval, selectable during installation in the range 3’-20’ (default setting 3’).