High capacity in combination with low sound level provides good comfort. The fan has an integrated backdraught shutter that prevents cold drafts, and ball bearings for long life. The Elect series has a mixed flow fan which makes it resistant towards duct pressure. Appealing design that suits most environments. Elect 125 STD is connected to an external switch and 125 mm duct. For wall and ceiling installation. Can be installed in zone 1 in bathrooms. When installing on a ceiling, remove the return damper to avoid condensation.