Toilet shower room without window

[Build49]

We are looking to renovate a downstairs area off the back of the kitchen, we hope to have a small toilet sink shower room but it would not be on an external wall so no option for a window. Would an extractor be enough to prevent damp? How common and comfortable is it to have a room like this without a window for light and ventilation?

 

[denso13]

Would an extractor be enough to prevent damp? How common and comfortable is it to have a room like this without a window for light and ventilation?

Very common and it works fine with a suitable ventilator. You should really get building regs approval.

 

[Harry Bloomfield]

Would an extractor be enough to prevent damp? How common and comfortable is it to have a room like this without a window for light and ventilation?

Quite doable, with the essential - adequate ventilation. Aside from providing adequate airflow out, a fixed means would be needed, to allow air to get in. The fan would need to be PIR, and humidity triggered, with a run on timer of 20 minutes.

 

[jj4091]

As Denso says in any room without adeqate natural ventilation ie a window normally, then one of the building rgulations ( though I can't quote you which one ) states you must have forced mechanical ventilation. The normal method of doing this is to have an extractor fan connected to the light that illuminates that room.and either a vent in the door or a gap underneath it to allow in air to replensish that air that is extracted. With no outside wall you need to be careful how you arrange to have extraction. I would have thought that an opening at each end of an extractor would give enough ventilation to prevent damp, and presumably in a shower room you will also have some form of heating. So I don't think that will be your biggest concern.

 

[opps]

You may need to fit a vent in the door to allow the air to enter the room.

 

[endecotp]

The fan would need to be PIR, and humidity triggered, with a run on timer of 20 minutes.

With no window, the light will always be on when the room is used. So connecting the fan to the light is fine.

 

[Harry Bloomfield]

So connecting the fan to the light is fine.

A PIR, guarantees the fan goes on.

 

[Old Salt]

My father’s old house built in tge early ‘80’s had a bathroom with no window. Fan came on with the light, worked fine with no damp. I would be more concerned with getting a fan with sufficient capacity.

 

[Murdochcat]

Part F requires you to fit an extractor fan with over run timer.