... liquid 2) temperature preservation is equipped with standard electric water heater setting,automatic temperature control exchanger, and increased anode ... bulk bubble and has a good effect oftemperature preservation 4) Water tank (interior): Stainless steel inner tank 5) Manifold: ... 8) With heat pipe: Anti-freezing>-35 degress centigrade 9) Water capacity: 150L 200L, 250L, 300L, 400L, 500L 10) Pressure ...