On Sunday, March 8, 2015 at 4:20:50 PM UTC, Roland Perry wrote:
In message , at
06:29:54 on Sun, 8 Mar 2015, DICEGEORGE remarked:

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

I've got a "modern type of hood" and the flue points upwards. As
that's not very helpful for most kitchen designs[1], I expect they
anticipate users installing a right-angle bend either through the
wall or sideways along the wall near the ceiling.

[1] I suppose you might get away with it on new build, in the void
between the ceiling and the floor above, if building regs
allow that it leads towards an external wall.
--
Roland Perry

its a bungalow and I don't want to cut into the roof