I have 4 cords of maple that needs to be burned. The existing hole in the wall that we have now is ok. We would like to get more heat out of it, and hopefully lower the fuel oil bill in the process. We just paid for and scheduled the install for a wood burning fireplace insert - Enviro Venice 1200. It will be going in on Sept. 5. Insert, stainless steel chimney liner, installation, taxes - just under $5100US.