Value | Category |
---|---|
1 | Central heating for building |
2 | Own domestic heating system using natural gas |
3 | Own domestic heating system using solid fuel |
4 | Own domestic heating system using liquid fuel |
5 | Stove using natural gas |
6 | Stove using solid fuel |
7 | Stove using liquid fuel |
8 | Other type of heating |
9 | NIU (not in universe) |