Tricky. I think probably the whole island size, but how far down does it have to go?

Also just to check have you looked at the Westin Stratus Compact?

Or Novy Pureline Compact. Both can fit into a height of 195mm

Try a Westin Stratus. We have one and it is incredibly effective and practically invisible

Thanks for your suggestions! @minipie & @smac232 The motor housing on the Novy would fit between the joists but the body would still sit below the ceiling level (our joists run the opposite way to the direction of the island). We would go for the lowest profile bulkhead possible if it comes to that.

The Westin Stratus Compact looks like a contender and fits within the plasterboard depth below the joists. I can't tell if the lights on the white version are stainless steel though which might be a deal breaker, especially being so expensive!

The only other one we found is the Air Uno Eclipse in white but the box is 8mm too deep and that doesn't include any clearance on top of the motor.

I’d suggest giving Westin a call, they might well be able to swap the lights for some with white bezels.

If there is one that works but for 8mm could you consider an 8mm lower ceiling level?? If you are doing a new ceiling anyway.

Alternatively do you have the option of putting the motor externally - this works well if you are ducting to eg a side passage rather than back or front facade - if so then you can get away with less depth. Again if you call Westin or Novy I’m sure they can help with possible configurations/products that could fit.

Do you cook over the hob a lot? If not, why not just do with a simple bathroom ceiling type extractor. That's what we done so no boxing or anything. That's really because I dislike the look and the noise of extractors. I use the hob only a couple times a week. Could live without a hob but a kitchen really should have one!

https://www.houzz.co.uk/photos/square-and-delicate-lines-contemporary-kitchen-melbourne-phvw-vp~58375142

An option could be the one I posted or this one
https://www.houzz.co.uk/hznb/photos/white-kitchen-contemporary-kitchen-phvw-vp~88125

Hi Fay, as mulligf says want about a BORA hob? the system was designed to solve problems just like this. Its quiet, very easy to clean, doesnt take up alot of space & most important it removes the cooking vapours / grease. Thought i would include a photo from a recent case study featured in the designer magazine. Similar in layout to what you are trying to achieve.

I too recommend a Bora hob and extractor. Had just your problem and the Bora, though expensive, does the job perfectly.

A venting hob like the Bora is the best solution, especially if you plan to use an induction hob. A ceiling extractor is discrete, but, if you enjoy cooking and making fumes, a ceiling extractor is not likely to work as well as a good ventilating hob. If you do speak to Westin, I think they will tell you that a ceiling extractor is not the best solution for cooks who like to make lots of vapours, especially with smokey cooking. A ceiling hob is usually too high to be effective for serious cooks, unless it has a very powerful motor and has a deep inclined baseplate, which does not help your issue. A venting hob can extract outside (with forward planning) or, in most cases, recirculate. The expense isn't that high given that you get a hob and extractor in one.

Hi Fay, With the ceiling extractor option, there is also an inline motor that can work if space is tight. This just means the motor can be put further away from the unit, or another option would be to have the motor on the outside of the house.

Thanks for all of your suggestions! We decided in the end to go with the AirUno Eclipse 90 as the small motor fits nicely between the joists, this hood area is also slim so we only need to drop the ceiling by 20-25mm = no bulkhead and minimal ceiling height lost, win win!