Extractor Fans

Extractor fans in bathrooms, toilets, utility rooms and kitchens can be a considerable source for draughts. The energy efficiency and effectiveness of new extractor fans have improved significantly.


The extractor fan you use in the bathroom, loo, utility room or kitchen will be inefficient when it is in operation if it is old, and probably a source of cold draughts when it is off. We noticed the latter when doing thermal imaging of properties – you can test this yourself by putting your hand by the fan when it is off and feeling the strength of the wind coming through.

Fans are usually operated manually, but can be triggered by humidity or the bathroom light. These fans usually come in two parts: the operating section that does all the work and the external grill or shutters on the outside, so each can be changed separately.

The fans are becoming more energy efficient as a result of ongoing European regulations and the requirements of British building regulations: typically an 8W fan will replace one using 15-18W. They are also becoming quieter. While helpful, the electricity saving is not as important as the draught-prevention.

The internal section can be changed by an electrician from inside the house, but changing the external grill may involve a ladder. New models can be supplied with an internal, backdraught grill as well as the external grill, to provide extra wind protection.

Geek says

  • You can replace the external and internal parts of your extractor fan separately.

Local experiences

If you’ve had an extractor fan installed, we’d love to hear about your experiences – both good and bad. Please get in touch!

Useful links




Leave a Reply

Your email address will not be published. Required fields are marked *