| Similarity | Rank | |
|---|---|---|
| boilers | 0.911 | 25056 |
| furnace | 0.832 | 12662 |
| firebox | 0.829 | 69140 |
| heating | 0.824 | 4216 |
| heater | 0.823 | 10118 |
| flue | 0.816 | 38443 |
| radiators | 0.807 | 37705 |
| pipework | 0.802 | 80616 |
| furnaces | 0.802 | 30904 |
| radiator | 0.783 | 21060 |
| steam | 0.782 | 5583 |
| underfloor | 0.772 | 66006 |
| chimney | 0.770 | 17271 |
| condensing | 0.770 | 47427 |
| evaporator | 0.770 | 54470 |
| sump | 0.765 | 30252 |
| gas-fired | 0.762 | 70372 |
| Boiler | 0.760 | 48453 |
| heaters | 0.756 | 15430 |
| ductwork | 0.754 | 50140 |
| ducting | 0.753 | 82490 |
| turbine | 0.747 | 13697 |
| refrigerant | 0.744 | 36320 |
| stove | 0.743 | 9831 |
| cooling | 0.742 | 5940 |