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Daylight & solar factor
EN 410 optical propertiesVLT, g-value, selectivity, solar heat gain and the daylight that reaches the room.
Glass
Exposure
m²
W/m²
Around 800 on a clear summer day facing the sun; lower for north.
lux
Solar heat gain
2.24 kW
Selectivity (VLT/g)
1.79
Genuinely selective
Light through the glass
10,000.00 lux
Shading coefficient
0.32
VLT
50.00 %
g-value
0.28
Glass properties only. It takes no account of shading devices, frame, reveal depth, orientation or the angle of incidence — all of which move the real gain substantially.
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