Multi-part Document
BS EN 303 - Heating boilers

This is a multi-part document divided into the following parts:

• Part 1 Heating boilers. Heating boilers with forced draught burners. Terminology, general requirements, testing and marking
• Part 2 Heating boilers. Heating boilers with forced draught burners. Special requirements for boilers with atomizing oil burners
• Part 3 Heating boilers. Gas-fired central heating boilers. Assembly comprising a boiler body and a forced draught burner
• Part 4 Heating boilers. Heating boilers with forced draught burners. Heating boilers with forced draught burners. Special requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum operating pressure of 3 bar. Terminology, special requirements, testing and marking
• Part 5 Heating boilers. Heating boilers with forced draught burners. Heating boilers for solid fuels, hand and automatically fired, nominal heat output of up to 300 kW. Terminology, requirements, testing and marking
• Part 6 Heating boilers. Heating boilers with forced draught burners. Specific requirements for the domestic hot water operation of combination boilers with atomizing oil burners of nominal heat input not exceeding 70 kW
• Part 7 Heating boilers. Gas-fired central heating boilers equipped with a forced draught burner of nominal heat output not exceeding 1000 kW