I have a 1 year old lopi liberty that I believe is over drafting. When The stove is burning I can hear and feel the stove pulling in a large amount of air. I can't get the stove to burn more than 6-7 hours and it seems like heat output should be a lot better. When I close down the air control all the way the flames don't seem like they slow down as much as they should. I covered both the front and bottom air ports with a glove and I get the lazy flames I'm looking for. The dealer said I may need to put a damper in my pipe. Any ideas or help?