EN 13363-1:2003+A1:2007

Solar protection devices combined with glazing - Calculation of solar and light transmittance - Part 1: Simplified method

Publication date:   Jun 26, 2008

General information

99.60 Withdrawal effective   Jul 19, 2017


CEN/TC 89 Thermal performance of buildings and building components

European Norm

17.180.20   Colours and measurement of light | 91.120.10   Thermal insulation of buildings



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This European Standard specifies a simplified method based on the thermal transmittance and total solar energy transmittance of the glazing and on the light transmittance and reflectance of the solar protection device to estimate the total solar energy transmittance of a solar protection device combined with glazing.
The method applies to all types of solar protection devices parallel to the glazing such as louvre, venetian or roller blinds. The position of the solar protection device can be interior, exterior or between single panes in a dual glazing system. It is applicable when the total solar energy transmittance of the glazing is between 0,15 and 0,85. Venetian or louvre blinds are assumed to be adjusted so that there is no direct solar penetration. It is assumed that for external solar protection devices and for integrated solar protection devices, the space between the solar protection devices and the glazing is unventilated and for internal solar protection devices this space is ventilated.
The resulting g-values of the simplified method given here are approximate and their deviation from the exact values lie within the range between +0,10 and -0,02. The results generally tend to lie on the safe side for cooling load estimations. The results are not intended to be used for calculating beneficial solar gains or thermal comfort criteria.
The simplified method is based on the normal incidence of radiation and does not take into account either the angular dependence of transmittance and the reflectance or the differences of spectral distribution. An allowance can be made for this fact when applying the method.

Related legislation

Legislation related to this standard


Construction products


Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec

Life cycle


EN 13363-1:2003+A1:2007
99.60 Withdrawal effective
Jul 19, 2017


EN 13363-1:2003+A1:2007/AC:2008


EN ISO 52022-1:2017