Special glazings

Sun-blocking glazings with a reduced g-value are unsuitable for high-performance housing. With such glazings, solar gains are reduced during the whole year. It is better to separate the two functions: maximizing passive solar gains and daylighting during winter, and preventing overheating during summer.

Electrochromic or gasochromic glazings offer an expensive alternative, where mechanical shadings are not possible. These glazings can vary the g-value and optical transparency by an internal two-phase material. The switching between the transparent and the opaque phase is provided by an applied electric voltage or by an additional H2 gas filling. A better solution is to plan the housing so that it does not need such solutions.

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Solar Power Sensation V2

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