● SUS444 white gold liner ● Hot water yield exceeds 90% ● Rated working pressure 1.1MPa ●2000Pa low pressure gas ●50mm thick fluorine-free polyurethane insulation ● Automatically switch flue damper to reduce standby loss ● Multiple pairs of water inlet and outlet interfaces, which can be combined freely ●LCD LCD display (intelligent unique) ● Comply with GB18111 -2021 "Gas Positive Displacement Water Heater" standard ● Manufactured in accordance with ANSI Z21.10.3/CSA4.3 water storage gas water heater standard ● The liner is guaranteed for six years, and the parts are guaranteed for one year