Is the damper in your flue a solid piece or does it have a big hole in the middle? The first wood stove I bought was a used stove from an estate auction. I went to town and bought the stove pipes and a damper that was one solid piece. The stove worked great and would really heat the house up good. In fact sometime the temperature would be controlled by how wide we would leave the front living room door open. I used that stove for about 4 years and then it got too burned out to use anymore. Then I bought a brand new stove (heartland) and it came with a damper to use. This damper was made with a big hole in the middle. It works good also as we don't have to keep the living room door open quit as often to control the heat. But when it is one of those bone chilling northern fronts it doesn't seem to heat the house very good and it seems to use a lot more wood then when we had the solid damper in.