BS EN ISO 7345:2018

This standard BS EN ISO 7345:2018 Thermal performance of buildings and building components. Physical quantities and definitions is classified in these ICS categories:

• 27.220 Heat recovery. Thermal insulation
• 01.060 Quantities and units

This document defines physical quantities used in the thermal performance of buildings and building elements, and gives the corresponding symbols and units.

NOTE Because the scope of this document is restricted to thermal performance and energy use in the built environment, some of the definitions it contains differ from those given ISO 80000-5.