... 12~24KW; 4) Safety devices; Description of water heater, heater, gas water heater, instant heater:1) Forced exhaust type with super slim design;2) Automatic ... improving heat efficiency, reducing the waste gas content;7) With wastage exhaust system;8) Residual Current Interrupters devices ... ;10) Full automatic control of gas and water. Technical data:1) Low water pressure start;2) Heat efficiency: ...