Wood Heaters, page-141

I blocked off the old bathroom extractor fans and fitted those combined extractor, heat and light units instead.
Only in the bathrooms.

They aren't exactly quiet but they do have some grunt.

I also vented them straight into the roof cavity and replaced the colour bond sheets where the old vents came through.
Then fitted one of the whirly extractors to vent the roof space.

I thought this thread had gone quiet but there's lots of posts to read.