Makes me wonder what "DATA" was supplied to start with if any. Oh maybe they used a % like in everything else. I wonder how many CFM of off gas is produced in a hour of the machine running. I saw 2 burners on it. What size BTU/HR burners are they. I am having a had time believing that enough gas is produced to run it for any period of time. After building a supply for a while, yes for a couple hours but after that......forget it.