| Value | Category |
|---|---|
| 1 | electricity from mains |
| 2 | lpg |
| 5 | paraffin |
| 6 | coal |
| 8 | wood |
| 9 | straw/shrubs/grass |
| 10 | agricultural crop |
| 11 | animal dung |
| 12 | electricity from generator |
| 13 | electricity from other source |
| 14 | solar energy |
| 95 | no heating/warming in household |
| 96 | other |