NF EN ISO 11855-8, P52-620-8 (12/2023)

This document specifies procedures and conditions for determining the heat flow within electric surface heating systems in relation to the nominal temperature of the systems medium. The determination of the thermal performance of electric surface heating systems and their compliance with this document is determined through calculations carried out in accordance with the design documents and a model. This allows uniform assessment and calculations regarding surface heating systems. This results in the surface temperature and temperature uniformity of the heated surface as well as the nominal heat flux density between the electrically heated layer and the premises. The ISO 11855 series applies to integrated water-based surface heating and cooling systems in residential, commercial and industrial buildings[1]. These methods apply to systems integrated into wall, floor or ceiling constructions without openings to the open air. They do not apply to ceiling-mounted panel systems with open-air openings not integrated into the structure of a building. The ISO 11855 series also applies, where applicable, to the use of fluids other than water as a heating or cooling medium. The ISO 11855 series does not apply to system testing. These methods do not apply to heated or cooled ceiling panels or beams. [1] ISO 11855-7 can also be used for integrated electric heating systems.
(Automatic translation from French)