... with batteries/electricity 3.low pressure start Gas water heater, gas geyser, geyser, gas water geyser, hermetic water heater1. Flame Failure Protection; Over-heating ... /Winter selection; Very easy installation7. Heat efficiency >90%. Flue type gas water heater8. With shower. With One A5 size Instruction manual, ... tin.Internal constructionburner and valves Heat exchanger flue type gas water heater