| Model | Type | Fuel | Efficiency |
|---|---|---|---|
|
|
|||
| Baxi Potterton Baxi Bermuda Inset 2 50/4E | Non-Condensing | Gas | 77.5% |
| Baxi Potterton Baxi Bermuda Inset 3 50/5 | Non-Condensing | Gas | 77.0% |
| Baxi Potterton Baxi Combi 130 HE | Condensing | Gas | 88.7% |
| Baxi Potterton Potterton Promax 15 HE | Condensing | Gas | 89.4% |
| Baxi Potterton Potterton Promax 24 HE | Condensing | Gas | 89.5% |
| Baxi Potterton Potterton Promax System HE | Condensing | Gas | 89.6% |
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