| Ventilation Type | Address Count | |
|---|---|---|
| Aereco DCV | 48 | |
| Continuous mechanical ventilation (CMEV) | 969 | |
| Demand controlled mechanical ventilation (DCV) | 307 | |
| Extract Ventilation | 150 | |
| Mechanical Extract | 37 | |
| Mechanical ventilation with heat recovery | 328 | |
| Natural | 74 | |
| Natural ventilation | 1096 | |
| Other | 21 | |
| Total | 9 |