No they wouldn't. Typically outside air systems shut off in fire mode, but they often keep running if there's smoke due to air pollution. If you need to deal wi

No they wouldn't. Typically outside air systems shut off in fire mode, but they often keep running if there's smoke due to air pollution. If you need to deal with this you need a HEPA. An alternative for critical facilities like datacentres, is they often just go into recirculation mode. This wouldn't work in locations with persistent air polution.