If you do really heavy sauteing, broiling or grilling and produce a lot of smoke, you'll need an exhaust vent that pulls air out from above the stove and empties to the outside. Don't get one that re-circulates filtered exhaust back into the kitchen or a downdraft system. They don't work very well. Refer to Consumer Reports for an intro on what to look for. I am partial to the rangehoods made by Broan because they can install the fan motor remotely, say, in the attic, just where it sends the exhaust to the outside, so you hear less noise than if the motor is in the rangehood. But there are other very good makes, which you can search on the web. What capacity exhaust do you need? That depends on how you cook. Some really serious home cooks install restaurant-grade exhaust systems, but you probably don't need to go that far. As a general rule of thumb, you probably want a system that moves at least 250 cfm (cubic feet per minute) of air, or 300 is better. If for some reason you feel you'll need a lot more than that, then you may have to worry about bringing fresh air in from the outside to compensate for the negative pressure created by the exhaust system. the important thing is to vent to the outside through as short a venting duct as possible.

I just went on to a website for Abt Electronics that was provided as a link from another vent question on this forum. Are all wall mounted hoods those stainless steel looking boxes? I just don't like the looks. Hmmm... my DH purchased on ebay an enormous vent fan. Pulls 400 cfm to 2800 cfms I think. Looks like Sputnik (for those of you as old as me). I kid you not... kinda the caveman approach to venting. He bought it for our outdoor grill. Just a nice Kenmore 4 burner grill mind you. Anyways... is there a way we could use that monstrosity for dual purposes? I think he was orginally going to mount it on the flat roof on our enclosed patio area (large area that extends with screening beyond the pool. The kitchen wall that the induction cooktop and wall oven (to be) is along the same outside wall that we keep the grill on. Is there a way we could duct two things to this one huge fan? If I can figure out how, I'll post a pic of this thing. If nothing else, it'll be good for a hearty laugh. I chuckle over the thing all the time.
Thanks,
Elyse

bumping myself... (is that tacky?) I'm really hoping someone might know something about this.
Thanks.