SUNSCREEN SOLAR CALCULATIONS

For further information, please contact technical support on +33 5 34 36 21 09. For rigorous calculation of the solar factor, apart from direct trans-mission of sunlight, account must be taken of: > reflection towards the interior> re-emission (and hence absorption)> the influence of diffuse radiation (not direct) > the solar and thermal properties of the glazing situatedbehind the sunscreens> masking effects due to the other components of the win-dow area > masking effects due to distant features (other buildings,trees, etc.)> the exposure of the window furniture area (north, south-west, etc.) This highly specific calculation can be performed by a spe- cialist engineering office. This brochure gives direct transmis-sions with the sun at 0°and 45°.

AUTAN

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angle of sunscreen0° angle of sun0°occultation in % 45° angle of sunangle of sunscreen0°vertical distancebetween centres100 mm150 mm 200 mm 250 mm 300 mm 500 mm 0°occultationin % 100 mm150 mm 200 mm 250 mm 300 mm 500 mm vertical distancebetween centresoccultation in % 50% 100% 33% 67% 25% 51% 20% 40% 17% 34% 10% 20%

HARMATTAN

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angle of sunangle of sunscreen0°vertical distancebetween centres100 mm150 mm 200 mm250 mm300 mm 500 mm 0°occultationin % 45°occultationin % 41% 100% 27% 77% 21% 58% 16% 46% 14% 38% 8% 23%

ZONDA

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45°occultationin % 60% 100% 40% 100% 30% 100% 24% 83% 20% 69% 12% 42%

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