I need to provide an appropriate amount of ventilation for an LPG hob in my kitchen. The cooker is close to french doors in the garden, and my plan is to have 2 or more smallish vents put in the wall above the doors (comfortably 2ft of space between the top of the doors and the ceiling.
I've seen some dark metal cowls for the interior of the vent, a sort of a quarter of a sphere, or like an elbow joint to that the opening faces downwards. Unfortunately I can't remember where they were (I have vague memories of a Screwfix leaflet, but I can't find them on the website).
Anyone have any recommendations? preferably dark / anthracite / case iron looking, but brushed/stainless steel at a push.