No additional vent required, I just have a vent cap that I put on it when not in use to keep any critters out. I believe the additional vent pipe is meant for restaurant installation so it can be vented outside or into a hood.But I have a question for those who have had one. Is an additional vent pipe required, or can it be used as is? They are pretty vague about that.
Although there have been a few people on the Cookshack forum that went all out and got the chrome exhausts from I80 Truck Stop.