Thank you all. Great info. I did read about the brick wall but I was thinking there had to be something cheaper and easier than building a brick wall. I really like the wall pass through. But have some questions.
What is the difference between this one and the one I posted previously? And is there a difference in pipe between the class a and double walled black pipe. An with the one you sent me would i need a clay thimble inside that and then my stove pipe through the clay or just my stove pipe through that wall piece?
Yes Im going into an existing chimney. The pipe is currently still hooked to the oil burner. So as soon as I get all my piping and my wall pass trough figured out and go get some coal, I'm still stuck using the devils water(heating oil). When the time comes I am going to disconnect the pipe from my oil burner and connect my coal stove pipe to that existing chimney pipe.