"DICEGEORGE" wrote in message
...
Over where the oven will be in the bungalow is a wall vent.
I'm upgrading the kitchen with either a gas or electric hob-
gas is more popular but makes more water vapour.
Its to be rented out for a few years

The existing vent isn't over the centre of the hob,
(its in the corner)
so I cant use a modern type of hood,
unless I knock a new hole in the wall

What about a humidity controlled fan like this
Humidistat Axial Extractor Fan
http://cpc.farnell.com/xpelair/dx100...tat/dp/HG00770

but the [Difference between kitchen and bathroom fan? ]
thread at https://groups.google.com/forum/#!to...-y/jlHrwW6bxWA
suggests a bathroom fan might be too noisy.

Plasterers are due in a week, so it'd be best to sort this out before
then.

Would it need a separate elec supply,
or is it ok to spur it off the cooker power?

You will need let air in if you're going to extract it.
Watch out for any fire/stoves, you may get combustion gases sucked back down
the chimney.