2012BS EN 15502-2-1:2012 Gas-fired central heating boilers. Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1000 kW
1994BS EN 297:1994 Gas-fired central heating boilers. Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW
1988BS 6332-1:1988 Thermal performance of domestic gas appliances - Specification for thermal performance of central heating boilers and circulators
1986BS 5258-1:1986 Safety of domestic gas appliances - Specification for central heating boilers and circulators