So I got an insert last fall and slammed it in , the guy I got it from said he heated his house with it and it had no chimney connection. Worked great. I was planning to line my chimney eventually but last night I decided to read the label, and came up with this
I have a 3' section of 8" on it to get it up into the chimney. Obviously times have changed and we know better. But if the stove says don't do it then ???