Just searched archives and still have this question. Most everyone is recommending 2 thermometers; 1 on stove and 1 on flue pipe. I'm venting into a fireplace and will only have about 4-6 inched of flue pipe visible. So, no flue thermometer? If not then do I just learn to use and rely on the stovetop thermometer? Sounds simple enough but thought I might be missing something.