Annex II Energy efficiency classes
United Kingdom
The energy efficiency class of a solid fuel boiler shall be determined on the basis of its energy efficiency index as set out in Table 1.
The energy efficiency index of a solid fuel boiler shall be calculated in accordance with Annex IX.
Table 1
Energy efficiency classes of solid fuel boilers
| Energy efficiency class | Energy efficiency index (EEI) |
|---|---|
| A+++ | EEI ≥ 150 |
| A++ | 125 ≤ EEI < 150 |
| A+ | 98 ≤ EEI < 125 |
| A | 90 ≤ EEI < 98 |
| B | 82 ≤ EEI < 90 |
| C | 75 ≤ EEI < 82 |
| D | 36 ≤ EEI < 75 |
| E | 34 ≤ EEI < 36 |
| F | 30 ≤ EEI < 34 |
| G | EEI < 30 |