also how bout creosote???
Almost none, clean the pipe and stove once a year. Firebox ever couple days (5 minutes tops) ash bin once a month (or less)
We've had ours 7 years now.
http://www.quadrafire.com/Products/Pellet_Burning/Pellet_Model.asp?f=santa-fe
Our unit is bigger since we heat almost 2,000 sq ft. $660.00 a year, a bag lasts us 18 hrs on the coldest of days. You should be able to get away with a ton rather than the 3 tons we use.
It is, compressed and kiln dried to a 7% moisture content. The wood is usually leftover from furniture manufactures.