Hello all. I have a tri level house with a fireplace in the basement. This summer my in laws upgraded there insert and gave us there old one. It's a Avalon pedelton. I have never lit the fire place before or install a insert so where do I start. I was looking at chimney liners and it seems like the preinsulated are the way to go but where's a good place to order. Thank you and sorry for the dumb questions. I have never done this before and don't want to burn my house down.