BS EN ISO 15927-5:2004+A1:2011
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Hygrothermal performance of buildings. Calculation and presentation of climatic data Data for design heat load for space heating
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31-10-2015
This part of ISO 15927 specifies the definition, method of calculation and method of presentation of the climatic data to be used in determining the design heat load for space heating in buildings. These include
the winter external design air temperatures;
the relevant wind speed and direction, where appropriate.
Heat loss through the ground, which also contributes to the heat load for buildings, depends on longer-term temperature changes; methods for calculating ground heat loss are given in ISO 133701).
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