| Value | Category |
|---|---|
| 1 | Electricity |
| 3 | Solar air heater |
| 4 | Liquefied petroleum gas (LPG)/cooking gas |
| 5 | Biogas |
| 6 | Alcohol/ethanol |
| 7 | Gasoline/diesel |
| 8 | Kerosene/paraffin |
| 9 | Coal/lignite |
| 10 | Charcoal |
| 11 | Wood |
| 12 | Straw/shrubs/grass |
| 13 | Agricultural crop |
| 15 | Processed biomass (pellets) or woodchips |
| 95 | No heating in household |
| 96 | Other |