Regarding this photo: http://lenr-canr.org/RossiData/T2%20before%20insulating.jpg
It is embarrassing. It makes me look even more amateur than I am. But it was deliberate! I was trying to make a pocket of trapped air above the TC. I was trying to test if this is a problem, as some people here have claimed. What I ended up with was: TC taped to pipe with Band-Aid, which I thought might let air onto TC. String binding two pipes together, wrapped in spiral around TC, to leave air space Packaging tape Foam pipe insulation, taped on I made sure the hot and cold water pipes were in firm contact. I placed the TC more or less on the side opposite the cold water pipe. It is noisy data, but in any case -- as I said -- I saw no difference when the pipes were tied together or the cold water was running. It might be easy to do this test with short lengths of copper pipe, one with cold water and one with hot, firmly attached together. A lot easier than with steam. I would put a TC on each, with the red liq. thermometers at the ends. I don't think it is necessary. If I had a heat exchanger I would just run hot water through it. Not steam. Too much trouble. If you do not see even 0.1 deg C difference with hot water stop worrying. - Jed
