btu thermometer

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    BTU and Flue Temperature Relationship?

    I am new to this site and curious about flue temperature and BTU output. I just replaced our great old Jotul 602B with an Efel Harmony 1 to get more heat. The Jotul was in our house when purchased 22 years ago but we never used it until this last memorable NE winter (another story!). The Jotul...