| very | 150 | degree |
| more energy | 41 | degree |
| in their use of energy | 13 | other |
| heat pump → be → efficient | 366 |
| heat pump → be → efficient way | 27 |
| heat pump → be at → least efficient | 5 |
| heat pump → be → efficient systems | 5 |
| heat pump → be → efficient method | 5 |
| heat pump → be → efficient system | 4 |
| heat pump → be → efficient means | 3 |
| heat pump → be → efficient machine | 3 |
| negative | neutral | positive |
| 0.138 | 0.252 | 0.610 |
| Raw frequency | 418 |
| Normalized frequency | 0.964 |
| Modifier score | 0.844 |
| Perplexity | 350.726 |