| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | central heating | Western countries | Common and essential for maintaining warmth during cold winters | 1 |
| 2 | heat exchangers | Western countries | An important component of heating, ventilation, and air conditioning (HVAC) systems in buildings | 1 |
| 3 | heat exchangers | Western countries | Highly regulated for efficiency and environmental standards in manufacturing and use | 1 |
| 4 | heat source | Western culture | Gas or electric stoves are the primary heat sources for cooking and heating water in households. | 1 |