1.Duct exhaust type, 2.Double ignition pin,automatic electrical pulse ignition device. 3.Over water

1.Duct exhaust type,

 2.Double ignition pin,automatic electrical pulse ignition device.3.Over water pressure protection device,

4.Water-gas interlock valve device,

5.Anti-dry combustion protection device.

6.Winter-summer switch option for gassaving,

7.Anti-freezing device

8.Free hand shower,

9.ODS device is optional,

10.20minuntestimer is optional,

11.Zero pressure water start for 5L&6L is optional,

12.White coated,metallic white/silver/golden color is optional.

water heater