NoFossil, would it be "bad" if I were to throttle my circs with the ball valves to control flow? I know to some extent it will increase velocity initially but I should reach a point where I'm decreasing flow and moderating velocity? My thoughts are to slow the main circ since my EKO is so close to the storage. I'm running 007's. I thought perhaps I'm just getting too much flow through the boiler right now. But then again, if 20 degrees is good, maybe I should just leave it alone?