Specification Sheet

ManualsBrandsAO Smith ManualsHot Water TanksAO Smith 100 Gallon Commercial Natural Gas Water Heater with 250,000 BTU Input from the Cyclone Series

Commercial Gas

Water Heaters

Page 5 of 6

AOSCG10210

GAS LINE CONNECTION SIZESTORAGE CAPACITY

RECOVERY CAPACITY

Model Series Natural Gas Propane Gas

BTH 120 300/301 3/4" NPT 3/4" NPT

BTH 150 300/301 3/4" NPT 3/4" NPT

BTH 199 300/301 3/4" NPT 3/4" NPT

BTH 250 300/301 3/4" NPT 3/4" NPT

BTH 300 300/301 1-1/2" NPT 1-1/2" NPT

BTH 400 300/301 1-1/2" NPT 1-1/2" NPT

BTH 500 300/301 1-1/2" NPT 1-1/2" NPT

Model Number Type of Gas

Input

Thermal

Efﬁciency

BTU/HR kW

BTH-120(A) Natural/Propane 120,000 35 95%

BTH-150(A) Natural/Propane 150,000 44 98%

BTH-199(A) Natural/Propane 199,900 58 97%

BTH-250(A) Natural/Propane 250,000 73 96%

BTH-300(A) Natural/Propane 300,000 88 96%

BTH-400(A) Natural/Propane 399,900 117 95%

BTH-500(A) Natural/Propane 499,900 146 95%

Model

Number

U.S. GALLONS/HR AND LITRES/HR AT TEMPERATURE RISE INDICTATED

Approx.

Capacity

°F 30°F 40°F 50°F 60°F 70°F 80°F 90°F 100°F 110°F 120°F 130°F 140°F

°C 17°C 22°C 28°C 33°C 39°C 44°C 50°C 56°C 61°C 67°C 72°C 78°C

BTH-120(A)

60 U.S. Gals. GPH 461 345 276 230 197 173 154 138 126 115 106 99

227 Litres LPH 1743 1308 1046 872 747 654 581 523 475 436 402 374

BTH-150(A)

100 U.S. Gals. GPH 594 445 356 297 255 223 198 178 162 148 137 127

379 Litres LPH 2248 1686 1349 1124 963 843 749 674 613 562 519 482

BTH-199(A)

100 U.S. Gals. GPH 783 588 470 392 336 294 261 235 214 196 181 168

379 Litres LPH 2965 2224 1779 1483 1271 1112 988 890 809 741 684 635

BTH-250(A)

100 U.S. Gals. GPH 970 727 582 485 416 364 323 291 264 242 224 208

379 Litres LPH 3670 2753 2202 1835 1573 1376 1223 1101 1001 918 847 786

BTH-300(A)

119 U.S. Gals. GPH 1164 873 698 582 499 436 388 349 317 291 269 249

450.96 Litres LPH 4405 3304 2643 2202 1888 1652 1468 1321 1201 1101 1017 944

BTH-400(A)

119 U.S. Gals. GPH 1535 1151 921 767 658 576 512 460 419 384 354 329

450.96 Litres LPH 5810 4358 3486 2905 2490 2179 1937 1743 1585 1453 1341 1245

BTH-500(A)

119 U.S. Gals. GPH 1919 1439 1151 959 822 720 640 576 523 480 443 411

450.96 Litres LPH 7263 5448 4358 3632 3113 2724 2421 2179 1981 1816 1676 1556

Model Number U.S. Gallons Liters

BTH 120 60 227

BTH 150 100 379

BTH 199 100 379

BTH 250 100 379

BTH 300 119 450.96

BTH 400 119 450.96

BTH 500 119 450.96

Recovery capacities are based on AHRI rated thermal efﬁciencies.

For ASME Construction add an “A” to the end of the model number ex: BTH-120A.