7 days? Or, are you missing a zero? I'm burning just slightly over a 5 gallon bucket a day (between 1 and 1.5 turns o a Harmon Mark III).We are burning just under 40 lbs. a day to heat the whole house (~2200 sq ft Cape built in '96). We started with 4 tons and have used 280 lbs so far.
Been burning for months straight now without a single hiccup.