Unless it is in the back side at the top it does not look to be vented. I know someone noted earlier the round chip loader cover had a cutout in it (you can see it in the photo below), so it may draw air in through the bottom or drain and out the chip loader for the chips. I would think the smoke would get stale in the food area without a vent though. Guess we have to wait until more photos or a schematic and manual get posted at the MB site before we know the answer since no one has seen one in real life yet.? where's the top vent