BS EN 673:2011 Glass in building. Determination of thermal transmittance (U value). Calculation method
- Abbreviation
- BS EN 673:2011
- Valid from
- 31/05/2011
- Information provider
- Standards New Zealand,
- Author
- British Standards Institution
European Standardization Organisations - Information type
- British Standard,
Description
This Standard specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces.
This Standard applies to uncoated glass (including glass with structured surfaces, e.g. patterned glass), coated glass and materials not transparent in the far infrared which is the case for soda lime glass products, borosilicate glass and glass ceramic.
It applies also to multiple glazing comprising such glasses and/or materials.
For the purpose of product comparison, a vertical position of the glazing is specified. In addition, U values are calculated using the same procedure for other purposes, in particular for predicting:
- heat loss through glazing;
- conduction heat gains in summer;
- condensation on glazing surfaces;
- the effect of the absorbed solar radiation in determining the solar factor (see Bibliography, [2]).
Reference should be made to [3], [4] and [5] or other Standards dealing with heat loss calculations for the application of glazing U values determined by this standard.
Scope
This Standard does not apply to multiple glazing which include in the gas space sheets or foils that are far infrared transparent.
The procedure specified in this Standard determines the U value1) (thermal transmittance) in the central area of glazing. The edge effects due to the thermal bridge through the spacer of a sealed glazing unit or through the window frame are not included.
Furthermore, energy transfer due to solar radiation is not taken into account. The effects of Georgian and other bars are excluded from the scope of this Standard.
The standard for the calculation of the overall U value of windows, doors and shutters (see EN ISO 10077-1) gives normative reference to the U value calculated for the glazing components according to this standard.
This resource is cited by:
BS EN 673:2011 Glass in building. Determination of thermal transmittance (U value). Calculation method
This document is CITED BY:
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H1/AS1 (Fifth edition) (Fifth edition, unamended)
BS EN 673:2011 is cited by Acceptable Solution H1/AS1: Energy efficiency for all housing, and buildings up to 300 m². from 29/11/2021
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H1/AS1 (Fifth edition, Amd 1) (Fifth edition, Amendment 1)
BS EN 673:2011 is cited by Acceptable Solution H1/AS1: Energy efficiency for all housing, and buildings up to 300 m². from 29/11/2021
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H1/AS2 (First edition) (First edition, unamended)
BS EN 673:2011 is cited by Acceptable Solution H1/AS2: Energy efficiency for buildings greater than 300 m². from 29/11/2021
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H1/AS2 (First edition, Amd 1) (First edition, Amendment 1)
BS EN 673:2011 is cited by Acceptable Solution H1/AS2: Energy efficiency for buildings greater than 300 m². from 29/11/2021
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H1/VM1 (Fifth edition) (Fifth edition, unamended)
BS EN 673:2011 is cited by Verification Method H1/VM1: Energy efficiency for all housing, and buildings up to 300 m². from 29/11/2021
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H1/VM1 (Fifth edition, Amd 1) (Fifth edition, Amendment 1)
BS EN 673:2011 is cited by Verification Method H1/VM1: Energy efficiency for all housing, and buildings up to 300 m². from 29/11/2021
-
H1/VM2 (First edition) (First edition, unamended)
BS EN 673:2011 is cited by Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m². from 29/11/2021
-
H1/VM2 (First edition, Amd 1) (First edition, Amendment 1)
BS EN 673:2011 is cited by Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m². from 29/11/2021
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ISO 10077-1:2017
BS EN 673:2011 is cited by ISO 10077-1:2017 Thermal performance of windows, doors and shutters — Calculation of thermal transmittance — Part 1: General
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ISO 10077-2:2017
BS EN 673:2011 is cited by ISO 10077-2:2017 Thermal performance of windows, doors and shutters — Calculation of thermal transmittance — Part 2: Numerical method for frames
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ISO 12631:2017
BS EN 673:2011 is cited by ISO 12631:2017 Thermal performance of curtain walling — Calculation of thermal transmittance
This resource cites:
BS EN 673:2011 Glass in building. Determination of thermal transmittance (U value). Calculation method
This document CITES:
BS EN 673:2011 cites BS EN 12898:2001 Glass in building. Determination of the emissivity
BS EN 673:2011 cites BS EN 674:1998 Glass in building. Determination of thermal transmittance (U value). Guarded hot plate method
BS EN 673:2011 cites BS EN 675:1998 Glass in building. Determination of thermal transmittance (U value). Heat flow meter method