These fans all have a backdraught shutter which opens/closes automatically. Supplied with wall liner.,6in. fan: an extract only fan operated by an On/Off switch or optional speed controller (see Fan Speed Controllers).,9in. & 12in. fans: these have integral switches for extract, intake or remote controller modes (see stock numbers 376-1562, etc. for fan controllers).
Time-saving, mortar-free installation The fan motor is mechanically isolated when the inner grille is removed Trickle ventilation facility when not in use On-site warranty 230 Vac mains powered.