Just trying to see if anyone else has had the same problem. I just purchased a Harman Oakwood for this winter. The stove is installed in the basement and there is a fireplace on the first floor above the stove. I never intend to use the fireplace with the Oakwood in the basement. Both these flues are in the same chimney with one chimney cap. Occasionally there is some smoke that downdrafts through the fireplace flue and out of the fireplace. I was wondering if anyone knows of a way to prevent this without completely closing off the fireplace.