Xpelair LV100 Square Axial Extract Fan with Timer and SELV Transformer is a compact and easy to install single speed fan. Suitable for a wide range of applications including bathrooms, shower rooms and toilets. Comes with a universal wall fitting kit. The shallow depth of the outlet spigot also makes these fans ideal for compact window installations. Supplied with an external 12V SELV transformer, allowing the fans to be installed safely in zone 1.