Michael Cochran

Hi Michael, I wanted to ask question about hofi style side draft and seems like you know quite a bit about it and I didn't want to start new thread. 3 questions really... Can the horizontal square duct penetrate through wood framing safely? also, I have vinyl siding on outside of shop, and was also wondering if I can wrap the horizontal with the vinyl J-channel(with small gap then caulk with high temp chimney caulk) and put siding back on? and lastly, is the standard 30guage 12" round duct for vertical sturdy enough for a 15 foot(3 pieces) stack? Any help you could offer would be greatly appreciated. Thank you, Jake