As much as I wish I could say I have heated my house this winter sans the propane furnace, it just isn't true. It seems that when it gets to 10F and below I just can't keep up. Sure I could rough it out and live through the low 60's in the house until the temps come back, which they always do, but my wife thinks it is just a bit too much and I agree. I just can't imagine what it would cost to heat this house with propane only. I went through about 10% of a 500 gallon tank of propane this winter just using it as supplemental heat to the 24/7 insert I have. I have had the furnace on for a total of 6 nights so far this winter and I still have all of Feb to get through. I think I will be finishing the basement this year, which I beleive I lose a lot of heat to. I'm not sure what else I can do upstairs execpt maybe some insulated window shades for the windows in the house. If that doesn't work then a good sized stove will be going in downstairs when it is finished. Any other confessors out there?