... Product name: 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.5> Heat loaded ... : 12Kw, 14KW, 16KW, 18KW, 20KW.6> Gas exhausts type: natural gas exhaust.7> Fire ignition type: water control impulse ignition ...