How to Fit a Bathroom Extractor Fan

We will be addressing the subject of how to install a bathroom extractor fan in sections, from the start of the process to installation and maintenance, and is as follows:

Where to position the extractor fan in your bathroom

Knowing where to install an extractor fan in the bathroom depends on the layout of your bathroom, some homes have a separate room for the toilet and bath/shower. In this case, the room with the shower/bath is the best option.

Generally, bathroom extractor fans can be anywhere on the wall as long as it is opposite the door but again is subject to your bathroom structure and the type of extractor you purchase. As long as it is in the vicinity of the window, (but not below a window) or on a wall that leads directly outside (or proceeded by venting that leads to outside) it should be okay. Once you know where to install it, you can proceed.

What you will need:

• Pencil
• Tape measure
• Drill and correct drill bit
• Flexible ducting
• Saw
• Hammer
• Chisel
• Safety equipment
• Screwdriver
• Mask and gloves & goggles

The Process

1. Use a pipe and cable detector, and make sure there are no obstructions inside or outside the wall that will block the fan. Do not place the outlet directly below a window.
2. For fitting a fan in a new place, you have to make a hole in your wall. Once you have made sure the wall is clear, hold your fan in place, and use your pencil to trace around the circular edge of the fan. Mark the centre point on the wall and drill a hole through the wall for reference.
3. Drill a series of holes around the circular tracing of your fan at around 35mm apart. Once you have done this, use a chisel and hammer to ‘chop out’ the wall within.
4. After creating the hole, insert the flexible ducting. It should fit at a slight downward angle whilst being flush against the internal and external walls. Trimmings can be made with the saw. (any repairs to plasterwork should be undertaken now).
5. On the inside wall, fit the fan over the hole and use your pencil to mark where it is secured to the wall. Drill the holes to insert any necessary fittings. Position the fan over these holes and secure it in place with your screwdriver.
6. Do the same for the outside wall.
7.  Now it’s time to make the electrical connections, in compliance with ‘Part P’ of UK building regulations, a qualified electrician must make the appropriate connections. If you don’t use a qualified electrician, you can risk damaging the electric circuits in your home, potentially electrically shocking any resident in the home, incurring a criminal fine, and being made to remove the installation.
8. After making the electrical connections, secure the grill covers over the fan on the inside of the bathroom and on the outside wall. If the cover has a slatted design, make sure to position them horizontally to keep the rain out. (Resourced from Plumbworld.co.uk)

What do I do if I can’t fit my extractor fan myself?