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How to install an exhaust fan

A person inserting an exhaust fan into a hole in a ceiling

Overview

Get rid of the steam in your bathroom by installing an exhaust fan. We'll teach you how to mount it on the ceiling and what to keep in mind when working out where to position it. You'll also see what tools you should use to do the job properly.

Steps

1Mark out the hole for your exhaust fan

When choosing a spot on the ceiling for your fan, get into your roof cavity and look for a gap in the joists that is clear of electrical wires. You should also clear any insulation away. Once you've found a good spot, tape the cardboard template in position on the ceiling and mark out your cutting circle.
A person taping a cardboard template to a ceiling

2Cut out the hole for your exhaust fan

Lay drop sheets down to protect your floor, fixtures and fittings. Then use your plaster saw to punch a small pilot hole inside the cutting circle you marked on the ceiling. Now, from inside the pilot hole, cut outwards and around the rim of the circle.
A person cutting a round hole in a ceiling using a plaster saw

3Install the exhaust fan in the ceiling

Put the fan in the hole, keeping the power cord on top of the motor where the electrician can reach it easily. Then hold the fan in place, while you tighten the screws on the rim. These screws engage small catches that grip onto the top of the plasterboard. Finish the job by pushing the cover plate into place. 
A person inserting an exhaust fan into a hole in a ceiling
Health & Safety

Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.

When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.