However in this particular article I am going to concentrate on installing your fan regarding the wall. The 220 volt fan the wall must be between 275mm and 350mm thick. You may need to cut a groove in the plaster for your power string. Put the power cable in position, leaving at least 250mm extra cable to spare. After passing the cable through hole, the following step will be extend the flexible tube to the gap required (this should donrrrt maximum of 350mm long). Now you can insert that tube into the hole promote good a problem tube lying flush on either side of the wall. Don't plaster on the Shielded Cable only at that stage. Fix the outer grill into position. Insert the back-draft shutter (if supplied using your extractor fan ), until it touches the outer grill. Wire up your fan in accordance with the manufacturer's instructions.
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