I have a Thulman Majestic corner wood burning insert unit that was installed in a single story family room addition (probably in the 70s), attached to my 2 story home facing west. My exterior chimney seems to be 2 feet about the family room roof peak, but isn't nearly as high as the 2 story roof. The chimney is probably about 12 feet from the main part of the house. On a windy day (typically wind from west coming over the top of the house), when not burning wood, I have cold air blowing down the flu and into room. When buring wood, sometimes smoke blows into room. Any suggestions to solve the problem? Any guaranteed solutions? I really like buring wood and would prefer not to move to gas direct vent. Thanks.