So I plan on putting in a Broan kitchen vent model PM250SSP (250cfm), there is an option to upgrade to a 390cfm unit, but what I’ve read 250 should be enough for most everyday cooking? I seem to get conflicting information regarding if the unit needs makeup air. The house is being built to be tight, so I am not sure if it requires a unit, if so would a 6″ Broan makeup unit be enough?, the kitchen vent is 7″ of course its also power by a fan. If it is required would the attached plan work with having it come in under the toe kick of the kitchen cupboards?
Thanks for any advice.