Ground Floor Bathroom Extractor Fan Query

[SparkyChick]

I did not say it was a regulation, just a pretty stupid thing to do IMO, and now we will go down the "some installations" yada yada yada.

Anyone going to give the OP some positive feed back instead of the usual guff.

The point is that people come here for advice. It's important that the advice we give them is accurate. You made a statement implying that a low voltage (230v) fan should not be in zone 1. This is factually incorrect and is thus duff advice that could cause complications for the OP.

With regards to the OP's questions, no I have no feedback to provide because I don't feel qualified to comment. I have a few things I might try if it were my property, but it's not and so I'm not going to muddy the water with speculative suggestions that may or may not work.

 

[Mike Johnson]

@DPG very true, but it was IMO

@westward10 can we try to start the New Year with a more positive attitude towards MY posts instead of picking over the minutiae?

Happy New Year to all.

 

[westward10]

@DPG very true, but it was IMO

@westward10 can we try to start the New Year with a more positive attitude towards MY posts instead of picking over the minutiae?

Happy New Year to all.

Not picking over anything #11 explains the error of your post.

 

[timhoward]

Going back to the original question...
If tight for space you might be able to fit an 100mm to flat ducting adaptor in:

Alternatively it might be better to start again with a new ceiling mounted vent above the bath/shower and fill in the old hole.
If you need more power the Manrose MF100T inline fan is very good.
In general ducting can be extended, though I'm not following how this applies if the original through-wall-to-outside option is now gone because of the extension.

 

[SparkyChick]

In general ducting can be extended, though I'm not following how this applies if the original through-wall-to-outside option is now gone because of the extension.

@lmike19 ,

I think this is where some of us might be struggling... a diagram or clearer explanation of the existing arrangements may help clarify things.

 

[lmike19]

Thanks for your replies.

I'm happy to install 230V in zone 1 as per manufacturer's instructions.

Existing installation is wall mounted, and ducting travels horizontal and then vertically up to the roof of the extension. I can see the steam coming out from extension roof when fan is operating/shower is on, so maybe just need more powerful axial fan? There is no window in bathroom anymore but there is a good gap beneath door.

 

[brianmoooore]

Axial fans don't work well into ducts of any length. You should be looking at centrifugal fans.

 

[lmike19]

Thanks Brian. I'll look to get the ducting re routed to being ceiling mounted instead.

 

[brianmoooore]

Don't know what the practicality is in your case, but an inline fan is superior to any wall or ceiling mounted fan if you have somewhere accessible to fit it. Quieter as well, if fitted properly.

 

[Mike Johnson]

Just fitted one of these: Soler & Palau TD Silent In Line Fans - https://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/Soler_TD_Silent/index.html and it is amazingly quirt compared to others fitted previously.