<p>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.</p>
<p>The calculation includes:</p>
<p>- 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;</p>
<p>- frames (of any material) with or without thermal breaks;</p>
<p>- different types of opaque panels clad with metal, glass, ceramics or any other material.</p>
<p>Thermal bridge effects at the rebate or connection between the glazed area, the frame area and the panel area are included in the calculation.</p>
<p>The calculation does not include:</p>
<p>- effects of solar radiation;</p>
<p>- heat transfer caused by air leakage;</p>
<p>- calculation of condensation;</p>
<p>- effect of shutters;</p>
<p>- additional heat transfer at the corners and edges of the curtain walling;</p>
<p>- connections to the main building structure nor through fixing lugs;</p>
<p>- curtain wall systems with integrated heating.</p>
<p>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.</p>
Registration number (WIID)
66762
Scope
<p>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.</p>
<p>The calculation includes:</p>
<p>- 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;</p>
<p>- frames (of any material) with or without thermal breaks;</p>
<p>- different types of opaque panels clad with metal, glass, ceramics or any other material.</p>
<p>Thermal bridge effects at the rebate or connection between the glazed area, the frame area and the panel area are included in the calculation.</p>
<p>The calculation does not include:</p>
<p>- effects of solar radiation;</p>
<p>- heat transfer caused by air leakage;</p>
<p>- calculation of condensation;</p>
<p>- effect of shutters;</p>
<p>- additional heat transfer at the corners and edges of the curtain walling;</p>
<p>- connections to the main building structure nor through fixing lugs;</p>
<p>- curtain wall systems with integrated heating.</p>
<p>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.</p>
