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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 really just means the glass part, however it is generally utilized to describe all elements of an assembly including glass, movies, frames and home furnishings. Paying attention to all of these aspects will assist you to attain efficient passive design.

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Energy-efficient glazing makes your home more comfortable and considerably lowers your energy costs. Inappropriate or improperly developed glazing can be a major source of undesirable heat gain in summer season and substantial heat loss and condensation in winter. Approximately 87% of a home's heating energy can be acquired and up to 40% lost through windows.

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Glazing is a substantial financial investment in the quality of your home. The cost of glazing and the cost of heating and cooling your house are closely associated. An initial investment in energy-efficient windows, skylights and doors can significantly lower your annual heating & cooling expense. Energy-efficient glazing also minimizes the peak heating and cooling load, which can decrease the required size of an air-conditioning system by 30%, causing further cost savings.

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

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The U worth 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 worth.

If your home 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 overall heat output of a big room gas heater or a 6.

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If you choose a window with half the U worth (3. 1W/m2 C) (for example, 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 (expressed as SHGCw) determines how easily heat from direct sunlight flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to your house interior. Glazing manufacturers state an SHGC for each window type and style. Nevertheless, the real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is understood as the angle of occurrence.

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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 constantly calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transferred.