该欧洲标准规定了基于玻璃板的热透射率和总太阳能透射率以及太阳能保护装置的透光率和反射率的估计与太阳能保护装置与玻璃窗组合的总太阳能透射率的简化方法。 该方法适用于所有类型的平行于玻璃窗的太阳能保护装置，例如百叶窗，威尼斯玻璃或百叶窗帘。太阳能保护装置的位置可以是双层玻璃系统中的内部，外部或单个窗格之间。当玻璃窗的总太阳能透射率在0.15至0.85之间时，适用。假设威尼斯人或百叶帘被调整为没有直接的太阳能渗透。假设对于外部太阳能保护装置和集成太阳能保护装置，太阳能保护装置和玻璃窗之间的空间不通风，并且对于内部太阳能保护装置，该空间通风。 这里给出的简化方法的所得g值是近似值，它们与精确值的偏差在0,10和-02之间的范围内。结果通常倾向于安全侧用于冷却负荷估计。结果不是用于f

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.