When we installed our Harmon P68 the only option was to go straight up with a 4"stove pipe. Because of our farm porch. I was told that I didn't need a OAK and reading some of the other threads I'm wondering if I should have installed one. I'm interested what you guys think.
![[Hearth.com] 4" stove pipe through the roof . Oak question. [Hearth.com] 4" stove pipe through the roof . Oak question.](https://www.hearth.com/talk/data/attachments/143/143581-1e64702016e33eafa43f2c28c0b51a84.jpg?hash=4BGBXlrupA)