EN ISO 12631:2017

Thermal performance of curtain walling - Calculation of thermal transmittance (ISO 12631:2017)

Publication date:   Jan 15, 2018

General information

60.60 Standard published   Jul 19, 2017

CEN

CEN/TC 89 Thermal performance of buildings and building components

European Norm

91.060.10   Walls. Partitions. Façades | 91.120.10   Thermal insulation of buildings

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Scope

ISO 12631:2017 specifies a method for calculating the thermal transmittance of curtain walls consisting of glazed and/or opaque panels fitted in, or connected to, frames.
The calculation includes:
- different types of glazing, e.g. glass or plastic; single or multiple glazing; with or without low emissivity coating; with cavities filled with air or other gases;
- frames (of any material) with or without thermal breaks;
- different types of opaque panels clad with metal, glass, ceramics or any other material.
Thermal bridge effects at the rebate or connection between the glazed area, the frame area and the panel area are included in the calculation.
The calculation does not include:
- effects of solar radiation;
- heat transfer caused by air leakage;
- calculation of condensation;
- effect of shutters;
- additional heat transfer at the corners and edges of the curtain walling;
- connections to the main building structure nor through fixing lugs;
- curtain wall systems with integrated heating.
NOTE Table 1 in the Introduction shows the relative position of ISO 12631:2017 within the set of EPB standards in the context of the modular structure as set out in ISO 52000-1.

Related legislation

Legislation related to this standard

2010/31/EU

Directive 2010/31/eu of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast)

Life cycle

PREVIOUSLY

WITHDRAWN
EN ISO 12631:2012

NOW

PUBLISHED
EN ISO 12631:2017
60.60 Standard published
Jul 19, 2017