I know I am in the minority, but I am not a vent-worrier.
I think there are some folks who think back on their parents homes, etc...and venting was rarely a consideration (granted BTU output was much lower). We have a vent over the island that I almost never turn on *blush* . I have induction.

My biggest comment would be to determine the largest pot or pan you planned to use on the induction unit and make sure it did not bump into the walls. A 12" fry pan still has overhanging sides and would hit the back and side wall, which would mean it could not be centered on the unit.

If that isn't an issue for you, I would not worry about venting (my humble opinion). If you want induction and it doesn't fit there, can you get a portable unit and pull it out when you need it?

Thanks so much! I think you are right about the venting...I also like your idea about the portable unit though. Just realized that a small prep sink is to the left of the unit so there really won't be a good place to put utensils. Think I am going to try to move electric above counter & go with a portable unit. Thanks again.