DIN EN 297:2005 Gas-fired central heating boilers - Type B boilers, fitted with atmospheric burners of nominal heat input not exceeding 70 kW; German version EN 297:1994 + A1:1994 + A2:1996 + A3:1996 + A4:2004 + A5:1998 + A6:2003
2014DIN EN 15502-2-2:2014 Gas-fired central heating boilers - Part 2-2: Specific standard for type B1 appliances; German version EN 15502-2-2:2014
2005DIN EN 297:2005 Gas-fired central heating boilers - Type B boilers, fitted with atmospheric burners of nominal heat input not exceeding 70 kW; German version EN 297:1994 + A1:1994 + A2:1996 + A3:1996 + A4:2004 + A5:1998 + A6:2003