We have had a Pellet Stove in our home for about 3 yrs. We have been very satisfied with the way it heats our home and quite affordably. This year however we purchased our Pellets ( a ton of them) at a big box store. These Pellets created so much more 'Ash' then others we have bought, and the heat factor was nill. I walked into our living room one morning and the temperature was only 56 degrees, with the stove on.