Constant trickle option. 90m3/h 25 litres per second. extraction rate. 40dB(A) at 3m on high speed. 40.8dB (A) at 3m at high speed, 25.8 on trickle. Adjustable Humidity Sensor. Mains 230v. Suitable for Bathrooms and Toilets.High power fan suitable for through the wall or ducted pipe runs.