Can't see a good answer to this - maybe someone else can?
Here's a bad ascii diagram of my wall where the cooker is and where the hood (which I haven't bought yet) might go.
Cut-away side view:
\ \ Loft \ < Roof tiles \ =========== \ Ceil || \ || \ || \ Hood || || \ || ||===========\ || || Soffit || || || || || || || || || || || || Cooker || || || || || || || || Outside wall (2 brick leaf cavity, 11" overall)
Because the roof soffit is rather lower (a good 18") than the ceiling, it doesn't look like much of a goer to ventilate the cooker hood through the wall - I haven't seen the insides of any cooker hoods so I'm not sure how high the extract duct is.
The way I solved this with the bathroom fan was rectangular flexi duct over the wall plate down into a soffit vent. But I am wary of flexi duct
- cooking grease and s**te - seems like a bad idea.
Straight up through a roof terminal might be an option - is this a done thing?
Any thoughts appreciated :)
Cheers
Tim