| MODEL | Input MBtuH | Output MBtuH | AFUE | Dimensions HxWxD | Water Content Gal. | Weight Lbs. | BOILER H/P | MIN. GAS PRESSURE (IN. WC) | MAX. GAS PRESSURE (IN. WC) |
|---|---|---|---|---|---|---|---|---|---|
| GB312-90 | 328.3 | 305.0 | 93.1 | 59.75 x 39.2 | 4.20 | 455 | 9.1 | 3.5 | 10.5 |
| GB312-120 | 440.5 | 409.0 | 92.8 | 59.75 x 39.2 | 4.20 | 455 | 12.2 | 3.5 | 10.5 |
| GB312-160 | 588.3 | 544.0 | 92.5 | 59.75 x 47.4 | 5.30 | 530 | 16.2 | 3.5 | 10.5 |
| GB312-200 | 732.6 | 676.0 | 92.3 | 59.75 x 47.4 | 6.30 | 585 | 20.2 | 3.5 | 10.5 |
| GB312-240 | 880.7 | 810.0 | 92.0 | 59.75 x 55.5 | 7.10 | 665 | 24.2 | 3.5 | 10.5 |
| GB312-280 | 1028.8 | 944.0 | 91.7 | 59.75 x 55.5 | 7.90 | 730 | 28.2 | 3.5 | 10.5 |
