Where natural ventilation is not possible, a mechanical extract system should be used. The system should have at least 2 extract fans, each providing 50% of the extract, with a secondary power supply to operate in the event of a mains power failure. Extract points should be designed with 50% of the outlets at high level and 50% at low level.
Why is this necessary?
A car park ventilation exhaust system has to limit carbon monoxide (CO) concentrations to levels specified in Australian Standards.
Secondly, in the event of a fire, assistance needs to be given to the fire service to clear smoke from the car park during and after the fire. Car park ventilation systems may, also, be designed to provide clear smoke free access for firefighters to tackle the seat of the fire, or alternatively to protect means of escape from the car park. These more complex systems are in excess of building regulations requirements and are used as compensating features when other requirements are not met.
Our inspection is a good method to demonstrate to approving authorities that the system is likely to perform satisfactorily.
Supported Standards
Expand list
| AS 1668.2:2012 | Mechanical ventilation in buildings |
| AS/NZS 1668.1:1998 | Fire and smoke control in multi-compartment buildings |
