... descriptions:1> Product name: constant temp. gas water heater3> Gas type: LPG(Y), Natural gas (T).4> Gas rated pressure: LPG ... , 14KW, 16KW, 18KW, 20KW.6> Gas exhausts type: natural gas exhaust.7> Fire ignition type: water control impulse ignition.8> Hot water output ... flow back protection.6> Over water pressure protection device.7> Winter/summer type.8> Cold and hot water switch.9> LCD and ...