| Value | Category | Cases | |
|---|---|---|---|
| 1 | central heating | 122 |
2.4%
|
| 2 | own system | 111 |
2.1%
|
| 3 | other (stove, electric heater, fireplace etc.) | 4784 |
92.2%
|
| 4 | no heating | 170 |
3.3%
|