DIN EN 15420:2011 Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW; German version EN 15420:2010
2017DIN EN 15502-2-1:2017 Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW; German version EN 15502-2-1:2012+A1:2016
2013DIN EN 15502-2-1:2013 Gas-fired central heating boilers.Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW; German version EN 15502-2-1:2012
2011DIN EN 15420:2011 Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW; German version EN 15420:2010