EN 677:1998 Gas-Fired Central Heating Boilers - Specific Requirements for Condensing Boilers with a Nominal Heat Input Not Exceeding 70 kW (Remains Current)
This European Standard applies to gas-fired central heating boilers, which are declared by the manufacturer to be "condensing boilers
EN 677:1998 history
1998EN 677:1998 Gas-Fired Central Heating Boilers - Specific Requirements for Condensing Boilers with a Nominal Heat Input Not Exceeding 70 kW (Remains Current)