It used to be ok to put fire dampers in the ventilation grill between the carpark and the fire pump room (combustion engined pumpset) system - but this hasn't been allowed for over a decade as the pumpset must be able to breath?
Ventilation to fire pump rooms must be fire rated from the building perimeter and fire dampers are forbidden.
Would you believe that this building houses one of Australia's most prominent mechanical consulting companies.