This is a graph from your controller card =3&amask;=5&amask;=6&amask;=7&amask;=8&dmask;=0:0&dmask;=0:3&month=01&day=01&year=2008&hour=00&minute=44&duration=1200&xsize=800&ysize=600°f=on&display=Display&sx=x&sy=y&ex=x&ey=y&appid=6]link to example Why is the oil out firing the amount and temperature we see? The graph seems odd I would have thought there would have been overlap between the firing of the wood and the oil out temp. Why are you not heating with 130 degree water on the top of the tank? According to some of the reading I have done you can still get some BTU's out of that right?? reference How do you know your sick-- when you monitoring other peoples heating cycles just curious.