siting an extractor fan

Electrical zones apply if mains. Generally the nearer the toilet bowl the better

NT

Ideally in a place so the the air drawn in from the bathroom door (which is where the replacement air comes in from) will replace all the air ie the furthest point possible from the door and as high up as possible.

Have you considered an in-line fan fitted in the loft space vented through the eaves or a roof tile vent? I've fitted one before and found it much better than the wall mounted fan it replaced. It clears the steam very quickly and is extremely quiet. Plus all you can see from the bathroom is a small air valve.

Be cautious if the proposed outlet faces into the prevailing wind. If so it can burn out quite quickly unless shielded.

My through-the-wall fan is on the SW wall so I used one of these beasties:

I put one of those over the exit grille from my kitchen extractor. It is on a west facing gable end, and has helped a lot to keep out the prevailing winds.

Chris

BTW, there's still some rattling of the antibackdraught shutter even with the cover. I'm wondering if a length of brush-type door seal would kill the turbulence. Some time, when ICBA to get the ladder round there, I'll try it. That's where the stainless PK screws come in handy.

I'm an extractor fan!

I used to love looking at them, particularly the great big 4X4 models. Now that I'm mostly sited indoors the fascination has worn off.

Mike

I did try an extractor fan but the neighbours complained about the diesel engine in the loft.

Already looking at vent axia!