I plan on installing my wood stove this weekend into an existing fireplace. I wasn't sure about the pipe I should run up my chimney. Can I just use a single wall stove pipe or do I have to use a double wall? The chimney is in good shape. I have a 1984 Jotul 8 Spin Draft stove. The chimney is big enough to use a single wall with room to spare. I'm trying to save money. Thank you for any help offered.