A fire suppression system, comprising: at least one emitter, said at least one emitter comprising: a nozzle having a nozzle inlet and a nozzle outlet; a duct, separate from said nozzle, said duct having a duct inlet, and a duct outlet separate from and positioned adjacent to said nozzle outlet; a deflector having a deflector surface positioned facing said nozzle outlet; said fire suppression system further comprising: a source of pressurized gas connectable in fluid communication with said nozzle inlet; a source of pressurized liquid extinguishing agent connectable alternately with one of said duct inlet and said nozzle inlet; and wherein connecting in use said source of pressurized gas with said nozzle inlet in combination with connecting said source of pressurized liquid extinguishing agent with said duct inlet results in discharge of an atomized liquid-gas stream from said emitter; and wherein connecting in use said source of pressurized liquid extinguishing agent to said nozzle inlet results in discharge of a liquid extinguishing agent stream from said nozzle outlet. at least one emitter, said at least one emitter comprising: a nozzle having a nozzle inlet and a nozzle outlet; a duct, separate from said nozzle, said duct having a duct inlet, and a duct outlet separate from and positioned adjacent to said nozzle outlet; a deflector having a deflector surface positioned facing said nozzle outlet; said fire suppression system further comprising: a source of pressurized gas connectable in fluid communication with said nozzle inlet; a source of pressurized liquid extinguishing agent connectable alternately with one of said duct inlet and said nozzle inlet; and wherein connecting in use said source of pressurized gas with said nozzle inlet in combination with connecting said source of pressurized liquid extinguishing agent with said duct inlet results in discharge of an atomized liquid-gas stream from said emitter; and wherein connecting in use said source of pressurized liquid extinguishing agent to said nozzle inlet results in discharge of a liquid extinguishing agent stream from said nozzle outlet. a nozzle having a nozzle inlet and a nozzle outlet; a duct, separate from said nozzle, said duct having a duct inlet, and a duct outlet separate from and positioned adjacent to said nozzle outlet; a deflector having a deflector surface positioned facing said nozzle outlet; said fire suppression system further comprising: a source of pressurized gas connectable in fluid communication with said nozzle inlet; a source of pressurized liquid extinguishing agent connectable alternately with one of said duct inlet and said nozzle inlet; and wherein connecting in use said source of pressurized gas with said nozzle inlet in combination with connecting said source of pressurized liquid extinguishing agent with said duct inlet results in discharge of an atomized liquid-gas stream from said emitter; and wherein connecting in use said source of pressurized liquid extinguishing agent to said nozzle inlet results in discharge of a liquid extinguishing agent stream from said nozzle outlet. a source of pressurized gas connectable in fluid communication with said nozzle inlet; a source of pressurized liquid extinguishing agent connectable alternately with one of said duct inlet and said nozzle inlet; and wherein connecting in use said source of pressurized gas with said nozzle inlet in combination with connecting said source of pressurized liquid extinguishing agent with said duct inlet results in discharge of an atomized liquid-gas stream from said emitter; and wherein connecting in use said source of pressurized liquid extinguishing agent to said nozzle inlet results in discharge of a liquid extinguishing agent stream from said nozzle outlet.