A.O. Smith BTH 120 - 250 - Manual (Page 2)

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Table 1. RECOVERY CAPACITIES - NATURAL GAS / L.P.
ROUGH-IN -DIMENSIONS CYCLONE XHE BTH 120 - 250
Recovery capacities are based on heater performance at 94% thermal efficiency.
TEMPERATURE RISE - DEGREES °F - GALLONS PER HOUR Model BTU Approx.
Input Gallon
Capacity 30 40 50 60 70 80 90 100 110 120 130 140
BTH - 120 125,000 Nat. 60 475 356 285 237 203 178 158 142 129 119 110 102
BTH - 120 120,000 L.P. 60 456 342 274 228 195 171 152 137 124 114 105 98
BTH - 150 150,000 Nat. 100 570 427 342 285 244 214 190 171 155 142 132 122
BTH - 150 150,000 L.P. 100 570 427 342 285 244 214 190 171 155 142 132 122
BTH - 199 199,900 Nat. 100 759 569 456 380 325 285 253 228 207 190 175 163
BTH - 199 199,900 L.P. 100 759 569 456 380 325 285 253 228 207 190 175 163
BTH - 250 240,000 Nat. 100 912 684 547 456 391 342 304 274 248 228 210 195