BS EN ISO 52022-1:2017 specifies a simplified method based on thermal, solar and light characteristics of the glazing and solar and light characteristics of the solar protection device, to estimate the total solar energy transmittance, direct energy transmittance and the light transmittance of a solar protection device combined to a glazing.

This document is applicable 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. This should be considered when applying the method.

The simplified method can also be used for inclined elements.


Cross References:
ISO 10292:1994
ISO 7345:1987
ISO 10293:1997 (R08)
EN 675:2011
EN 673:2011
EN 410:2011
ISO 9050:2003 Ed 2
EN 14500:2008
EN 674:2011
ISO 10291:1994 (R10)
ISO 52022-3:2017
ISO 52000-1:2017
ISO/TR 52000-2:2017
CEN/TS 16628:2014
CEN/TS 16629:2014
ISO/TR 52022-2:2017


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