Xpelair Premier CF20 Centrifugal Extract and Condensation Control Fan is ideal for installation in bathrooms, shower rooms and other zone 1 and 2 wet areas where longer duct runs are required. This fan comes with SELV transformer to be located out-of-zones. An integral humidistat and condensation control keeps moisture and mould at bay. Feature a pullcord manual override and a room size selector ensures that the fan is operating at the optimum speed for a particular room for maximum efficiency.