As of the 2013.f version, the thermal transmission coefficient of walls in contact with soil is calculated in accordance with ISO 13370 "Thermal performance of buildings. Heat transfer via the ground. Calculation methods".
In previous versions, the program used tables proposed in the Spanish CTE - HE code. Now, a more detailed calculation is carried out, as the program considers factors such as the description of the soil, which can be edited in the general data of the job.
