The pan that we use if from an old Leader Half Pint evaporator. Several years ago the arch was replaced with a stainless steel one but the pan is original. The problem that we had was how to boil outside even when the weather did not want to cooperate. The solution was to design a steam hood for outdoor use that does not need to be supported. It needed to have enough height to allow for a preheater, a way for the steam to escape but not let any rain, snow or wind to come in contact with the pan and also allow easy access to see what is going on inside. Instead of channeling the steam out of a 4" or 6" pipe like traditional units I went with a 2" opening along the ridge that is covered by an elevated (3") roof. To allow for easy access I designed two doors, attached with piano hinges, that run the entire length on both sides. I really had no experience in working with metal so I used something that I could easily bend with a few clamps and a 2" x 4".