Who said water can t light a fire? The Controlled Energy Corporation s Bosch AquaStar Model 125HX incorporates a revolutionary hydro-generated ignition system allowing the heater to operate without a standing pilot electricity or a battery This innovative technology uses the energy from the flowing water to ignite the spark The Bosch AquaStar Model 125HX is the first tankless water heater of this kind Provides endless hot water for one major application at a time such as a shower washing machine