"Mark" wrote in message
...
My in-laws have a gas JennAire with the center vent and it works fine.


The success of such a system depends to some extent on what kind of cooking
is being done. The OP said "We like high-temperature stir frys, deep frys,
and (ultra messy) fried onion and chili pastes." At some point which is
tough to determine in a discussion like this, any system will be unable to
handle the mess. And/or, the ductwork will get atrociously filthy and begin
to stink.