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How it works

    Glass manages solar heat radiation by three mechanisms: reflectance, transmittance and absorptance

    These are defined as follows:

    (1) Reflectance – the proportion of solar radiation reflected back into the atmosphere
    (2) Direct transmittance – the proportion of solar radiation transmitted directly through the glass
    (3) Absorptance – the proportion of solar radiation absorbed by the glass.

    In hot conditions or for building with high internal loads, solar control glass is used to minimize solar heat gain. It allows sunlight to pass through a window while radiating and reflecting away a large amount of the sun's heat.

    In more temperate conditions, it can be used to balance solar control with high levels of natural light.