VENTS Silenta 100mm (4-Inch) Diameter Bathroom Extractor Fan with Run-on-Timer
Outer size 157x159x21mm. Low energy consumption - White. An impressive 78 m3/hour extract airflow rate (22 l/s). Low noise, only 26 dBA @ 3m distance from the fan. Long life 240 v saving motor, only 5.5 w running power.