| cupboard | 0.39 |
| provide hot water | 0.59 |
| heat hot water | 0.56 |
| act as a water heater | 0.56 |
| bring cost-effectiveness | 0.44 |
| follow same heating pro… | 0.41 |
| lose pressure | 0.41 |
| bring the best of heati… | 0.41 |
| come in various outputs | 0.39 |
| suit semi-detached house | 0.39 |
| provide effective water… | 0.39 |
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| the minimum of moving p… | 0.58 |
| right output | 0.39 |
| easy-to-use control pan… | 0.30 |
| less space | 0.51 |
| compact | 0.61 |
| great | 0.56 |
| more efficient | 0.51 |
| perfect | 0.29 |
| one such kind | 0.28 |
| more suitable | 0.25 |
| central heating boiler | 0.59 |
| easier to install | 0.53 |
| quicker to install | 0.49 |
| high efficiency water h… | 0.45 |
| a heating system | 0.45 |
| popular choice | 0.42 |
| the most popular type | 0.41 |
| on constant standby | 0.40 |
| difficult task | 0.39 |
| a combi boiler | 0.38 |
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| installed | 0.60 |
| connected to the mains … | 0.45 |
| suited to smaller homes | 0.41 |
| of high quality | 0.38 |
| available in a variety … | 0.37 |
| installed in a hard-wat… | 0.37 |
| available in three sizes | 0.36 |
| available in each range | 0.35 |
| given an a | 0.31 |
| known for energy saving… | 0.29 |
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