I'm thinking of connecting my rear flue from my new F50 Rangeley directly from the adapter into my 6" Supervent stainless steel walled, insulated chimney pipe. This is due to the chimney pipe being in a 2 foot square, metal lined duct chase. Does anyone know if the Supervent can take this kind of heat directly out of the rear flue? I also can use some duravent double wall, and then connect into the Supervent, if I need some heat loss. Thanks for the replies, IH3444