Jim-

First, I want to thank you for the valuable resources at your website. It's taken me several visits to review most of the material, but I've always enjoyed returning to the site. The information has been terribly helpful at assuring clients that an asethetically appealing fireplace can also be efficient. And the technical and historic data has been helpful for addressing inconsistent info. from BIA, MIA or Architect-employers.  I am currently working on a project for friends in South Dakota.....