I had a nice customer today, well a irrate nice customer today, that brought me his burn tubes and some photos of the firebox. The burn tubes looked like a pile of cooked speggetie. After the tonge lashing was over, and he said his piece, i asked him. "how much construction lumber did you run through this thing?" He looked at me like i was a idiot, and stated, "THATS ALL I USE! ITS A FRIGGING (but the real word) CONSTRUCTION SITE!!" As i was wiping the spit off my face, i got the owners manual, and photocopied the warrenty section, and the section that states that you must burn seasoned cord wood, stapled it together, with his original recipt and my card, and advised him to take it up with whoever he thinks is responsible.. He decded that wasnt the info he was looking for and wadded it up and threw it on the floor, cussing my store on the way out the door. The guys wife who was red from embarresment, complety flipped out when she found out what caused it, i feel for him tonite. (not realy) Point is, you folks reading this, scrap lumber is not ok, no were near ok. These stoves burn to hot, and that wood is to dry, you can seriously overfire your stove like this guy did.