[jyl]

Hmm, good points everyone.

Right now there are upper cabinets on the range wall, and the vent duct horizontal run is in those upper cabinets. I could build a soffit. That would be easier than going up into the ceiling.

Oh, wait. On the other side of the range wall is the stairwell going down into the basement and side door. I could simply run the ducting exposed in the stairwell.

I like the idea of a high hood, that is much deeper and wider than the range. My thought is that the larger hood will capture dirty rising air, using coverage instead of a very big CFM fan. For the combined BTU of my range burners, standard guides say I need a 1400 CFM vent fan and a makeup air system. I'm trying to find a way to avoid that big a vent/makeup air system.

I'd also like to be able to stand under the hood instead of bumping my head against the hood. You know how commercial kitchens are set up, with the big hoods extending past the edge of the range, over the cook's head.