scope:

NEN-EN 50465 specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy and the marking of a micro combined heat and power appliance; (hereafter referred to as "mCHP appliance"). This European Standard applies to mCHP appliances of types B22, B23, B32, B33, B52, B53, C1, C3, C42, C43 C52, C53, C62, C63, C82, C83 and C9 based on the classifications of CEN/TR 1749: - that use one or more supplied gases of the three gas families at the pressures stated in EN 437, - where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 ºC during normal operation, - where the maximum operating pressure in the - heating water circuit does not exceed 6 bar, - domestic hot water circuit (if installed) does not exceed 10 bar, - which are either intended to be installed indoors or outdoors in a partially protected place, - which are intended to produce hot water either by the instantaneous or storage principle, - which have a maximum heat input (based on net calorific value) not exceeding 70 kW, - which are designed for sealed or open water systems.