Extractor fans

[Mairzydotes]

My husband and I (now 77 and 80) are finding it getting very hard to get up and down to the loo in the night, as we have a three floor house, and the bathroom is on the first floor.
Yesterday we had a Saniflo toilet and hand basin fitted in a cupboard in the corner of our bedroom, and are delighted with it,, surprising how well it has fitted in to a small space.
However it is on an inside wall, with no way of fitting a fan to the exterior,
It is a very old house with lath and plaster ceilings, so to fit a light plus fan, as my brother has in his modern house is not an option.
Ideas, please.

[Naomicorlett]

our bathroom has fan in ceiling then is ducted via flexi-tube (similar to tumble dryer vent tube ) thro roof space to outside wall. Hope this helps -----Who did the fitting ? they should be able to help.

[Mairzydotes]

Thanks for both answers, they certainly give us something to think about.