1 Scope
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
NOTE 1 In some cases, external dimension systems define the boundary at the lower surface
of the floor slab.
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.
NOTE 2
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.