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Permeable or not, this is in the case of glass, in fact the question. Light shines through, this is what most people think, however, this is not quite true. Low iron glass is aimed to protect cells, but it is supposed to also let more light energy shine on the modules than normal window glass. On the other hand, modern three-or four-glazed windows let light through, but form an energy-saving temperature barrier. This way in the winter the cold stays outside and the heat inside. In the summer modern windows can automatically darken and prevent the room from heating up - energy for air conditioning is therefore saved. Glass has a lot of potential, a fact the visitors to the trade fairs glasstec and solarpeq in Düsseldorf, will have the chance to convince themselves of.
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