| ensure higher performan… | 0.53 |
| recover more heat | 0.53 |
| utilise wasted heat | 0.48 |
| happen with traditional… | 0.45 |
| make more of the energy | 0.43 |
| help to save money | 0.43 |
| operate at high efficie… | 0.42 |
| produce cool flue gas t… | 0.38 |
| generate more hot water | 0.34 |
| eject gas | 0.31 |
| More » |
| more efficient | 0.75 |
| more expensive | 0.38 |
| a plumeof vapour | 0.33 |
| great heating system | 0.29 |
| designed to make better… | 0.44 |
| backed by national netw… | 0.33 |
| fitted to traditional i… | 0.33 |
| released | 0.30 |