| in a building | 8 | location |
| to ensure | 6 | purpose |
| in most homes | 5 | location |
| energy → be used for → heating | 246 |
| energy → be used in → heating | 41 |
| energy → be used by → heating | 9 |
| energy → be for → heating | 8 |
| energy → be used on → heating | 5 |
| energy → be used for → heating purposes | 4 |
| energy → be used to provide → heating | 3 |
| energy → be designed to provide → heating | 3 |
| negative | neutral | positive |
| 0.200 | 0.611 | 0.188 |
| Raw frequency | 319 |
| Normalized frequency | 0.742 |
| Modifier score | 0.910 |
| Perplexity | 224.487 |