EN 1020:2009 带有风扇助燃气体或燃烧产品传输,净热输入功率不超过300kW的空间加热用非家用强制对流空气加热器
Non-domestic forced convection gas-fired air heaters for space heating not exceeding a net heat input of 300 kW incorporating a fan to assist transportation of combustion air or combustion products