| Room | Rapid ventilation |
Background ventilation |
Extract
ventilation fan rate or passive stack (PSV) |
| Habitation room | 1/20th of floor area | 8000mm2 | N/A |
| Kitchen | Open
window (no minimum size) |
4000mm2 | 30
l/sec adjacent to a hob or 60 l/sec elsewhere or (PSV) |
| Utility room | Open
window (no minimum size) |
4000mm2 | 30 l/sec or (PSV) |
| Bathroom | Open
window (no minimum size) |
4000mm2 | 15 l/sec or (PSV) |
| Sanitory accomodation | 1/20th of floor area | 4000mm2 | Mechanical
extraction at 6 l/sec |
| Room
without windows |
N/A | N/A | Mechanical
extraction as above with 15min overrun |