Replace the second paragraph by the following text : "This European Standard applies to standard boilers and low-temperature boilers with a nominal heat output not exceeding 1000 kW and with a water temperature at normal operation not exceeding 105 °C." Replace the 2nd dash of the third paragraph by the following text : "- condensing boilers;" Delete the last but one paragraph of EN 303-3 : "This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H."