1 Scope
This European Standard defines the specifications and test methods for the construction,
safety, rational use of energy and fitness for purpose, environment and classification
and marking of gas-fired storage water heaters for domestic hot water uses, hereafter called “appliance”.
This European Standard applies to appliances:
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— of selected types B1, B2, B3, B5, C1, C2, C3, C4, C5, C6, C7, C8, C9 according to CEN/TR 1749;
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— fitted with atmospheric burners;
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— using one or more combustible gases corresponding to the three gas families and the pressures indicated in EN 437;
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— of nominal heat input not exceeding 150 kW (net calorific value);
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— fitted with electrically operated mechanical flue dampers that are positioned downstream of the heat exchanger.