The CF100 centrifugal fans use the latest technology to provide extremely powerful, yet very quiet and vibration free ventilation. The CF100 ranges are designed for bathrooms, toilets, cloakrooms, utility rooms. Designed to move air over long distances, these units will give maximum performance even against pressures caused by long lengths of ducting and resistance by grilles. All models are fitted with a built-in spring operated non-return flap into the discharge spigot to stop backdraughts. There are seven models in each series.