Picked up a couple bags to try the other day. Came home from a school band concert last night and the house was 66 degrees which was unacceptable to my better half. Fired the stove with the FSUs in it and set it on heat level 4 of 5. In @ 1.5 hours the house was 70 with 275 degree temps from the convection fan. Outside temp mid-thirties. Ash seems low and glass stayed clean thru the two bags. Went back and grabbed the last 7 bags. I'll keep watch for more to show up at HD.