... : duct type gas water heater2> Model number:HSD-C593> Gas type: LPG(Y), Natural gas (T).4> Gas rated pressure: LPG: 2800pa, Natural gas: 2000pa. ... 12Kw, 14KW, 16KW, 18KW, 20KW.6> Gas exhausts type: natural gas exhaust.7> Fire ignition type: water control impulse ignition.8> Hot water ... /summer type.8> Cold and hot water switch.9> LCD and ODS optional.10> 20minutes timer function. Duct Type Gas Water ...