I am installing a Lopi Endeavor in a 1500 sq ft brick ranch style house with a metal roof and 4/12 pitch. 8 ft flat ceiling with about 5 foot of attic and the stove will be installed near the peak of the house. That means about 12 feet of class A double wall pipe is all I need for the install. My question is the dealer that I have found that I really like dealing with says that I need a ceiling support or roof support for the pipe. 6T-RSP or 6T-SB are the part numbers. What I don't understand is why the 450 lb stove cannot support the weight of 3 sections of 4' x 6" pipe? I mean they can't weigh that much. I am going to get my stove and pipe one day this week and can't wait to finish the install. I will post pics when done.