Fuel Saving System for Steam Boiler Hho Hydrogen Gas for Steam Coal Fired Boiler Heating. No Chemical Additives Needed: Unlike combustion catalysts that require continuous chemical feeding, our hydrogen oxygen system uses only water and electricity to produce clean combustion gas - zero se. Instant Ignition Response: HHO gas ignites instantly at lower temperatures than natural gas or coal dust, eliminating delayed ignition risks and reducing boiler startup energy consumption by up to 40%. Extend Boiler Service Life: HHO gas eliminates hard carbon deposits on heating surfaces, improving heat transfer efficiency and reducing corrosion - typical boiler tube replacement intervals extended.