Hi All, I've just moved to a house with a downstairs bathroom hence leaving a window open after a shower is no longer an option. I thought the best option would be to install an extractor fan while I'm putting in the new bathroom suite. However I have two questions...
1) I've seen a fan which operates on a humidistat, not connected to the light switch in anyway. Has anyone had experience of these? Are they any good. I'm looking at one for ~=A330 from Screwfix.2) I have an airbrick - well it's actually cast iron. I was planning to knock that through and use that to install the fan. The question is, do I need to install a duct through the wall and a vent on the exterior wall? Or can I just install the fan on the interior wall only? I would prefer not to touch the outside of the house as the cast iron "brick" is quite ornate (and 80+ years old) and fits in with the rest of the house. Would I risk damp getting into the cavity? I'd assume I would be no better or worse than the current arrangement?
Cheers.