Recommend looking at Westin Stratus, Westin said it would work at our 2.8m ceiling height so reckon it would be good for you. You really want it externally ducted if at all possible - will your hob be within the extension or the original house?

Apparently extractors are all much more effective if you turn them on 10 min in advance rather than only once it's fumy.

Ah cross posted, sounds like you will have a short ducting run which is good, also make sure the new kitchen ceiling is made deep enough to take a wide duct pipe (I can't remember what is diameter is recommended but I know it doesn't fit in some period ceilings).

The only issue may be routing it round/under any steels you are having.

Hmm I think for ducting longer but fewer bends may be better than shorter but with sharp bends. And the side wall would definitely be better than right under your window. Maybe speak to westin, they are helpful!

Actually I’ve just realised ours may be coming out right under our bathroom window. Agh!

Our extractor would be 900mm wide, same as our hob, but our hob will be gas.

Yes, losing the drawer is a downside. Shame. Because it does work so well.

Hello Heather, I think you are right in having these discussions with your builder right now, has the project already started? Unfortunately, I left my serious/ detailed discussion on ducting to the last minute because the builder said all along, he can duct out easily but we didn't discuss the exact details, now I can't duct out where I want and it's causing me a real headache ( as it might lead to more boxing in, in addition to my existing boxing in - you replied to my post earlier on 'Ugly boxing in of steels' ). My hob is on a wall and the plan was to duct out through the joist and out of extension roof but my pipe is 2.6m until we get to the extension. We had to have 2 extra joists put in for support of the above floor which now means we can't have a 6inch duct pipe because the joists are in the way, so we are thinking of alternatives but I have a feeling that I might have to duct under the ceiling and box box box and then get around the steel beam.....argh!

My only advice is that whatever ducting you plan to have, make sure the builder can definitely deliver what he says he can, go through with him the exact details of how he will do it, otherwise when the time comes, he might turn around and say, sorry we can't do it now. Or even have a plan B.

My kitchen company also recommended that you switch the hood on for a bit before you cook and for a while after as well.

My architect has told me that many can have the motor offset to one side, on case that helps. So it is possible to have a ceiling extractor under a beam as long as there is space to one side for the motor.