Bathroom Extractor Fan Dripping

RelievedSheff

alexfire said:

RelievedSheff said:

alexfire said:

I have a small bathroom which has had an axial fan fitted to a flexi pipe which vented into the attic. I was advised this should be vented to the outside and so hired a roofer.

He made a vent through the roof and replaced the pipe with a solid plastic 100mm soil pipe. During showering the fan seems to collect water on the outsides which I'm assuming may be condensation running back down ?

I've tried lagging the pipe with aluminium foil and sheep wool but it's still happening. Since it's collecting drops during the shower I'm unsure whether it's a power issue although I can't remember the old one doing that and this is a higher powered fan ...

Would really appreciate any support / advice.

Images:

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We have the exact same fan and have a similar issue with it but only during certain weather conditions and certain temperatures usually in early spring and late autumn before we have switched the heating on.

Ours is condensation forming on the plastic casing of the extractor fan rather than condensation running back down the ducting.

Now that the heating is on and the room warm the dripping has vanished. It will come back again in early spring when we turn the heating off and the shower room is a bit cooler.

Thanks that's interesting to know - I did wonder whether it was condensation forming on the casing rather than in the pipe. I'm going to try and improve the insulation anyway and see if that helps at all before trying a condensation trap.
If it does become a problem then I guess the less ideal option would just be to put it on the wall making sure the exit is lower tha the fan itself. 

Have you had any issues with the condensation tripping the electrics - that's my worry ?

It has not tripped yet.