Just as a cautionary note, being vent less doesn't mean a thing if you are putting a vent less oven into a commercial establishment as many municipalities have codes that require ALL ovens, vent less or not, be located under a hood, some even dictate the type of hood, so be SURE to check with your codes department before jumping on the "vent less" wagon.
But it's vent less! The manufacturer says that it doesn't need a hood! So why do you say that it has to be located under a hood? Because the CODE says all ovens must be located under a hood. Lotsa luck winning that argument. Been there, done that, the only time we ever came close to winning that argument is when the codes were changed and we were able to be grandfathered in as the oven had been in use for some time under a Type-II hood but codes changed to requiring a fire suppressant hood.......Thank God we got out of that one.
Tom Lehmann/The Dough Doctor