Update for this thread.Nick from sbi has helped me a lot with my rusting issues and they have also offered me an extended warranty on the firebox.Very pleased so far with the service from sbi as of recent.I had a barometric draft installed awhile back and it was calibrated to the specs in the manual.However i would like to permanently install a dwyer mark 2 for future measurments.I notice there are different models of the mark 2 can anyone suggest which model would be best for my heatmax 2?Also be nice to have some info on an install guidline i searched online and here but couldnt find much info.Thanks
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