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Extractor Fan Series: Installing your Bathroom Extractor Fan

Where should you put an extractor fan?

You will want your fan to work at its best so there are a few conditions that are good to try and meet.

  1. Mount your fan as high as possible on the wall.

2. Try and position it as close to the main source of steam and condensation as you can - remember to check the IP rating is suitable.

3. Try and keep it away from a window - this ensures fresh air isn’t being sucked right back out of your room.

If you aren’t able to fit an extractor fan through your wall or ceiling, they can also be placed in windows. This is generally a much easier job as it requires less building work, however, you will need to cut a hole in your glass, and this can be a  tricky job for DIY beginners - contact a glazier if you are unsure.

Do bathroom exhaust fans have to be vented outside?

It is always a good idea to have your bathroom exhaust fan vent outside. The purpose of your extractor is to remove moisture from the air, if you simply deposit it in another room or attic, you are could just moving the problem to another area. 

To avoid dampness and mould entirely, make sure your fan exits outside.

How much does a bathroom extractor fan cost?

The overall cost to install a new bathroom extractor fan depends on a few things, such as:

  • Which fan you buy
  • Whether you are replacing an old fan or fitting a new one
  • How straight forward your job is - is it simply being fit through an external wall? Or do you need longer ducting to reach your external venting point?

Bathroom extractor fans do vary significantly in cost. As you would expect some basic models can be bought for less than £20, but the more specialist models can be closer to £100. When it comes to fitting it, that will depend entirely on the scale of the job. Replacing an old fan like-for-like may only take a few hours. However, if you require any rewiring or new building work, this could take much longer, which in turn would increase the cost of a skilled tradesperson.

When it comes to fitting it, that will depend entirely on the scale of the job. Replacing an old fan like-for-like may only take a few hours. However, if you require any rewiring or new building work, this could take much longer, which in turn would increase the cost of a skilled tradesperson. 

See the rest of our extractor fan series - Everything you ever wanted to know about bathroom ventilation