DIN EN 778:2010
燃烧气体或燃烧物质的无风扇辅助传输、净热输入功率不超过70kW的空间加热用家用燃气式强制对流空气加热器
Domestic gas-fired forced convection air heaters for space heating not exceeding a net heat input of 70 kW, without a fan to assist transportation of combustion air and/or combustion products; German version EN 778:2009