RSI i stole your heat exchanger chart.....question is where did you get the info?......is the rates at 1/2",3/4",1" ect.. inlets and outlets?
Model Btu/hr Flowrate GPM Hot Inlet ℉ Hot Outlet ℉ Psi
LB10 40,000 6.20 180 160 5.175
LB20 80,000 7.44 180 160 3.5
LB30 110,000 8.93 180 160 1.7
LB40 156,000 10.71 180 160 1.02
LB50 220,000 12.86 180 160 0.7
LB60 300,000 15.43 180 160 0.56
LB70 400,000 18.51 180 160 0.42
LB80 538,000 22.22 180 160 0.36
LB90 710,000 26.66 180 160 0.3
LB100 930,000 31.99 180 160 0.24