EnviroVent SIL100PIR SILENT Extractor Fan for Bathroom with Sensor PIR 4" 100MM

Fitted with motor mounted on silent elastic blocks, this fan delivers incredibly quiet running and exceptional performance with stylish features. This model has a built in PIR Movement Sensor which automatically switches the fan on when movement is detected, then off after a pre-set time. Features: Sealed for life ball bearings Silent elastic blocks IP45 rated Backdraught flaps Dimensions: 158mm wide x 158mm high. Spigot is 99mm diameter (for connection to 100mm ducting) and projects for 80mm beyond installed surface.