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?