In the past, a variety of system types, such as sprinklers, AFFF foam sprinklers, carbon dioxide, clean agents, and water mist, have been chosen.
The primary method of protection for both interior generator rooms and outdoor generator enclosures in recent years has been water mist. Systematic water mist is FM approved to protect generators and have successfully passed fire tests. They solve issues with ventilation and the impossibility of sealing off generator rooms. Most of the time, they can put out pool fires.