| Value | Category | Cases | |
|---|---|---|---|
| 1 | District heating by utility or boiler | 1193 |
22.1%
|
| 2 | Own central heating system | 200 |
3.7%
|
| 3 | Separate heating devices | 3933 |
72.8%
|
| 4 | Other | 76 |
1.4%
|