CSN EN 303-1

CSN EN 303-1 This European Standard applies to boilers used for central heating (heating boilers) with forced draught burners with a nominal heat output not exceeding 1 000 kW, which are operated either with negative pressure (natural draught boilers) or with positive pressure (pressurized boiler) in the combustion chamber, in accordance with the boiler instructions.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.