BS EN ISO 13370:2017
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08-16-2017
This document provides methods of calculation of heat transfer coefficients and heat flow rates for building elements in thermal contact with the ground, including slab??on??ground floors, suspended floors and basements. It applies to building elements, or parts of them, below a horizontal plane in the bounding walls of the building situated
at the level of the inside floor surface, for slab??on??ground floors, suspended floors and unheated basements;
NOTE1 In some cases, external dimension systems define the boundary at the lower surface of the floor slab.
at the level of the external ground surface, for heated basements.
This document includes calculation of the steady??state part of the heat transfer (the annual average rate of heat flow) and the part due to annual periodic variations in temperature (the seasonal variations of the heat flow rate about the annual average). These seasonal variations are obtained on a monthly basis and, except for the application to dynamic simulation programmes in Annex D, this document does not apply to shorter periods of time.
NOTE2 Table 1 in the Introduction shows the relative position of this document within the set of EPB standards in the context of the modular structure as set out in ISO 52000-1.
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