Spoke to someone today with a central boiler and he mentioned something he put in his boiler to counteract chemicals in the pallets he occasionally burns. Apparently someone he knew with the same unit burned a steady diet of pallets and the chemical reaction thinned the walls of the boiler to the point that when he scraped the creosote he punctured the unit, and the company wouldn't warranty the unit. I never considered burning pine but I have a line on a significant quantity of packing materal and am concerned if it is fact treated wood. The name of the stuff sounded like amistrol? Anyone ever heard of this?