Unfortunately that's not likely to work, at least in an effective manner that would make it worthwhile, and trying to make it work is going to be a logistical nightmare. You're asking to have the oven and the downdraft occupy the same space, and making it recirculating on top of that puts even more stuff underneath in the cabinet. There are some blowers that can be mounted behind or to the side of the "pop-up" part of the downdraft, but it's still not going to work with the oven in the same space - you're not going to be able to have the downdraft butted up against the cooktop like you would in a standard installation (making it even less effective), and you'd need a large island just to have room for it.

Should I put the oven on a wall??? Or.....http://www.bestrangehoods.com/cattura It looks as though the Best downdrafts have new side venting options that might work in my island. Anyone have any experience with the new Best Downdrafts? Any other downdrafts that don't take up a lot of space? Or no venting at all in a high rise condo with windows 3 ft away?

But a Best Cattura isn't recirculating.

Actually the Best Cattura has a recirculating kit....https://www.youtube.com/watch?v=mnX4sFlYoxw

Your design is very much driven by wishful thinking. I understand. I've been there before. You'd really want it to work this way, and it's frustrating that nobody makes the appliances you want.

A downdraft hood is close to useless, with one noteworthy exception, all recirculating hoods are no more than expensive white-noise machines, and even if you could fit in that place, a wall oven really doesn't work well under a countertop let alone under a cooktop.

Pretty much the only thing you have going for you is the induction cooktop. That's a solid choice.

I suggest you go back to the drawing board and pick a more conventional set up. A induction cooktop, a vent-a-hood recirculating island hood, and a wall oven at countertop level should result in a much more functional kitchen.

They are called wall ovens for a reason, if you want it under the cooktop why not just get a range . As for vneting recirculating hoods rarely work anybetter than nothing and downdrafts are already useless so really what you are looking for is kind of useless.So the idea above it probably the best.

Thanks for your comments And appreciate your thoughts. I have had a wall oven under a cooktop for years and it works great.