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H4 Contemporary Specifications
| Model | Gas Type | Input (BTU/HR) | Output Max | |
|---|---|---|---|---|
| High | Low | |||
| 650ILN | NG | 24,000 | 6,500 | 17,506 |
| 650ILP | LPG | 24,000 | 13,000 | 17,506 |
| 650IRN | NG | 24,000 | 6,500 | 17,506 |
| 650IRP | LPG | 24,000 | 13,000 | 17,506 |





