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Glazing just indicates the windows in your house, consisting of both openable and fixed windows, as well as doors with glass and skylights. Glazing in fact simply implies the glass part, however it is usually utilized to refer to all elements of an assembly consisting of glass, films, frames and furnishings. Focusing on all of these elements will help you to attain effective passive design.

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Energy-efficient glazing makes your home more comfy and considerably reduces your energy expenses. Unsuitable or inadequately designed glazing can be a major source of undesirable heat gain in summer season and considerable heat loss and condensation in winter. Approximately 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a significant financial investment in the quality of your home. The cost of glazing and the expense of heating and cooling your home are closely related. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly decrease your annual heating and cooling bill. Energy-efficient glazing also decreases the peak heating and cooling load, which can minimize the needed size of an air-conditioning system by 30%, leading to additional expense savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Comprehending some of the essential properties of glass will assist you to pick the best glazing for your home. Secret properties of glass Source: Adjusted from the Australian Window Association The quantity of light that passes through the glazing is referred to as noticeable light transmittance (VLT) or noticeable transmittance (VT).

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The U worth for windows (expressed as Uw), describes the conduction of the whole window (glass and frame together). The lower the U value, the higher a window's resistance to heat circulation and the better its insulating worth.

For example, if your house has 70m2 of glazing with aluminium frames and clear glass with a U value of 6. 2W/m2 C, on a winter's night when it is 15C colder outside compared to inside, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the total heat output of a large space gas heating system or a 6.

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If you select a window with half the U worth (3. 1W/m2 C) (for instance, double glazing with an argon-filled gap and less-conductive frames), you can cut in half the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) measures how readily heat from direct sunshine flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to the house interior. The real SHGC for windows is impacted by the angle that solar radiation strikes the glass.

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When the sun is perpendicular (at 90) to the glass, it has an angle of occurrence of 0 and the window will experience the maximum possible solar heat gain. The SHGC stated by glazing makers is constantly determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transmitted.