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Types of glazing and their specific values

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alent to the energy expenditure from 60 litres of heating oil => Assuming average energy prices in Germany... ach square metre of such a window "costs" € 42 in heating energy each year. Not only the energy losses are... losses to less than the equivalent of 7 litres of heating oil per square metre – less than one eighth of th... the room is ensured independently of the type of heating supply. That this was made possible, is due in co