We're going to have the bathroom ceiling insulated & replastered, & I'm thinking of having an extractor fan put in at the same time. I asked our plumber about it last time he was here & he recommended ducting it out the roof (the bathroom is in an offshot under a sloped roof, with a partly sloped ceiling to match) & said it was a job for a roofer or general builder rather than him. (He subcontracted a roofer to deal with the top of the balanced flue when he replaced our boiler.)
Anyone else tried this? Any specific recommendations for fans, ducts, etc.?
AIUI, there are a couple of ways to control the fan: from the light switch with a timer running after the light is switched off, & with an automatic humidistat. Any recommendations on that?
Thanks.