1. Flame Failure Protection; Over-heating protection;  Over-water-pressure protection
2  Anti-water freeze protection; Anti-frost protection; Low electricity protection
3  Anti-wind flow back device; Anti-corrosion gas and water valve
4  Full size reflector inside for better performance; Electric power pilot light
5. Ignition safety: The pilot must be lit before the electromagnetic valve will allow gas to enter the burner. If the pilot flame is extinguished for any reason, the gas inlet is automatically shut off.

6. Summer/Winter selection; Very easy installation
7. Heat efficiency >90%.   Flue type gas water heater
8. With shower. With One A5 size Instruction manual, injector to connect the pipe