| Model | Type | Fuel | Efficiency |
|---|---|---|---|
|
|
|||
| Powermax 140 | Non-Condensing | Gas | 82.1% |
| Powermax 155 | Non-Condensing | Gas | 80.9% |
| Powermax 155x | Non-Condensing | Gas | 82.0% |
| Powermax 185 | Non-Condensing | Gas | 81.8% |
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