I'm not sure how that helps. The diagram shows a timer fan (such as the OP is wanting/hoping to install) with, as expected, L, S/L and N connections. What it does not show is the OP's present non-timer fan, which I strongly suspect will have terminals marked L and N (not S/L and N).
Yes, we all understand that. I was merely suggesting a reason why the OP might have been confused into saying that the non-timer fan did not have a 'switched live'.
This is winter. The window faces West, where the prevailing wind comes from, so it would blow cold air into the bathroom, and push the water vapour into the house. So the window is shut. The extractor is at ceiling level, and the water vapour rises up and is sucked out. Room temperature dry air enters the bathroom to replace it through the gap under the door.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
