I am a newbie here and I am researching to buy a pellet stove as a back-up system in case the power grid goes down for an extended time period during the winter months. As I was surfing the other day different manufacturers, I happened upon a review by another buyer for a certain model pellet stove and the person said in their comments that they burned 20 bags of pellets in 17 days. Now without knowing the size (btu) of his/her stove and the home dimensions (sq.footage) I thought to myself that was alot of pellets for only 17 days. I would have to build a storehouse out back just for the sacks of pellets if a real emergency happened. Any comments?