9. Glossary

9.1 Thermal insulation

Conductivité thermique déclarée; declared thermal conductivity

Value of the thermal conductivity of a material or product used for building equipment and industrial installations:

• based on data measured under reference temperature and humidity conditions;

• provided as a limit value, according to the ISO 13787 determination method;

• corresponding to a reasonable expected life under normal conditions.

Conductivité thermique utile; useful thermal conductivity

Value of the thermal conductivity of an insulating material or product, under specific outdoor and indoor conditions,...