Surface mounted dual speed centrifugal fan with timer

Surface mounted fans can be wall or ceiling mounted and have a centrifugal impeller designed to overcome longer duct runs. The SF90DT is a dual speed fan so low level ventilation can be provided using the slow speed. The fan has an on/off pull cord switch plus a delay on Timer
These carry on running for an adjustable period - usually about twenty minutes after it has been switched off - but this can be set to anywhere between two and thirty minutes. The benefit is that the fan will continue to operate when the room is no longer in use, continuing to clear the moisture.timer allowing the user between 2-3 minutes before the fan operates at normal speed. Switching off will activate the Timer
These carry on running for an adjustable period - usually about twenty minutes after it has been switched off - but this can be set to anywhere between two and thirty minutes. The benefit is that the fan will continue to operate when the room is no longer in use, continuing to clear the moisture.timer and the fan will switch to slow speed. The fan will switch off at the end of the overrun time which can be altered by adjusting the sensor. The fan back plate can be removed and fully installed before the fan and motor assembly are fixed in place. The IP rated 44 fan can be located in Zones 1, 2 or 3.