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Glazing just implies the windows in your house, including both openable and set windows, along with doors with glass and skylights. Glazing in fact just suggests the glass part, but it is generally used to describe all aspects of an assembly including glass, films, frames and furnishings. Focusing on all of these elements will assist you to achieve efficient passive design.

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Energy-efficient glazing makes your house more comfy and considerably reduces your energy costs. However, inappropriate or poorly created glazing can be a significant source of undesirable heat gain in summer season and substantial heat loss and condensation in winter season. As much as 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 home are closely associated. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly lower your annual heating and cooling costs. Energy-efficient glazing likewise lowers the peak heating and cooling load, which can minimize the required size of an air-conditioning system by 30%, resulting in additional expense savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the key residential or commercial properties of glass will help you to select the finest glazing for your house. Secret homes of glass Source: Adjusted from the Australian Window Association The amount of light that passes through the glazing is called visible light transmittance (VLT) or noticeable transmittance (VT).

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

If your home has 70m2 of glazing with aluminium frames and clear glass with a U worth of 6. 2W/m2 C, on a winter season'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 total heat output of a big room gas heater or a 6.

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

The lower a window's SHGC, the less solar heat it transmits to the home interior. The actual 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 optimum possible solar heat gain. The SHGC stated by glazing makers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is transmitted.