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Glazing just indicates the windows in your house, consisting of both openable and fixed windows, along with doors with glass and skylights. Glazing in fact simply indicates the glass part, however it is generally used to refer to all elements of an assembly consisting of glass, films, frames and furnishings. Taking note of all of these aspects will assist you to attain reliable passive design.

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Energy-efficient glazing makes your home more comfy and significantly decreases your energy costs. Nevertheless, 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. Up to 87% of a home's heating energy can be gotten and up to 40% lost through windows.

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Glazing is a considerable financial investment in the quality of your house. The expense of glazing and the expense of heating and cooling your house are closely related. An initial financial investment in energy-efficient windows, skylights and doors can greatly reduce your yearly heating & cooling bill. Energy-efficient glazing also decreases the peak heating and cooling load, which can lower the needed size of an air-conditioning system by 30%, causing more expense savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding some of the key residential or commercial properties of glass will assist you to select the very best glazing for your house. Key homes of glass Source: Adjusted from the Australian Window Association The quantity of light that passes through the glazing is known as visible light transmittance (VLT) or noticeable transmittance (VT).

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The U value for windows (revealed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U value, the greater a window's resistance to heat flow and the much better its insulating value.

If your house has 70m2 of glazing with aluminium frames and clear glass with a U worth of 6. 2W/m2 C, on a winter's night when it is 15C chillier outside compared to inside, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a big room gas heating unit or a 6.

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If you select a window with half the U value (3. 1W/m2 C) (for example, double glazing with an argon-filled space 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) determines how easily heat from direct sunlight flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to your home interior. Glazing manufacturers declare an SHGC for each window type and design. The real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is understood as the angle of incidence.

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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 optimum possible solar heat gain. The SHGC declared by glazing producers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transferred.