Flammable gas diluter and method therefore

A flammable gas diluter for diluting a flow of flammable gas to a concentration below the flammability limit of said flammable gas, said diluter comprising:

• a dilution vessel comprising an outer envelope defining a longitudinal flow passage from an inlet to an outlet;
• at least one air inlet assembly for directing a flow of air into said inlet of said dilution vessel;
• a flammable gas inlet arrangement located towards an inlet end of said dilution vessel;
• two gas flow generators configured to pump a flow of air into said air inlet assembly, said two gas flow generators being located upstream of said flammable gas inlet arrangement;
• wherein
• said two gas flow generators are configured to operate as operational and backup gas flow generators, and
• two dampers, one damper associated with each of said gas flow generators, each of said dampers being mounted between said corresponding gas flow generator and said dilution vessel, said dampers being configured to obscure a passage between said corresponding gas flow generator and said dilution vessel when closed and to open said passage between said gas flow generator and said dilution vessel when open;
• and
• control circuitry configured to control the opening and closing of said dampers, said control circuitry being configured to open said damper during an operational mode of said corresponding gas flow generator and to close said damper when said corresponding gas flow generator is stopped in standby mode.