| Value | Category | Cases | |
|---|---|---|---|
| 1 | Central heating system | 79898 |
18.2%
|
| 2 | Electric heater | 2040 |
0.5%
|
| 3 | Boiler | 10156 |
2.3%
|
| 4 | Stove | 345942 |
79%
|