Well it was not your advice that I disliked, it was the way you put it.
Sarcasm holds very low to me. I have been researching furnaces and
chimneys for a long long time now on the web. I just had a question
about the particular model I have of fireplace, since it appears to
have a secondary path to the chimney, although I cannot see well enough
to be sure. No point wasting good house air is there? I called the
makers and evern they didn't know if I could close the damper! Hence my
question on google.

Well, thanks all the same.

Dean