Redeye wrote:
so me and the missus were having a conversation last night about how we
want to do the kitchen when we can afford it. she talked, i listened.

anyway, we have a bit of a problem in this kitchen at the moment -
condensation. the building is about 250 years old, converted about 100
years ago from a hay barn into a house. so, one of our main priorities
will be keep it ventilated a bit better than it is at the moment.
we'll probably end up having a hood over the hob and a humidistat
controlled extractor fan.

the problem comes with getting this to the outside world. because of
an awesome arrangement of window/drains/boiler there is absolutely no
way to get through to the outside world above about 1m from the floor.
so, can we duct a combined extraction from the hood and the extractor
fan down the wall at some point so that we can get it through the wall
beneath the window somewhere?

is there any good reason not to do this other than it sounding like a
daft idea?


Its OK in theory, but in practice airflow goes down rapidly with pipe
length..you may need a fairly meaty fan and fairly large bore pipework.