I am burning more than last year and will be close to what I burned 2 years ago. That being said I switched over from propane to NG last year and I don't mind supplementing with NG, in fact NG is probably cheaper. But to put this into perspective, when I was really trying to keep the energy bills down 2 years ago I burned about 5 tons of pellets and used about 100 gallons of propane. This year I will use about 5 tons of pellets but I have really been letting the furnaces run and I know I will use way more than the equivalent of 100 gallons of propane. Maybe I should really look at my gas bill?