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Glazing simply indicates the windows in your house, including both openable and set windows, as well as doors with glass and skylights. Glazing actually simply implies the glass part, however it is normally used to refer to all elements of an assembly including glass, films, frames and home furnishings. Taking note of all of these elements will assist you to accomplish effective passive design.

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

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Glazing is a significant investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can greatly lower your annual heating and cooling bill.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending a few of the crucial homes of glass will assist you to select the very best glazing for your home. Key homes of glass Source: Adjusted from the Australian Window Association The amount of light that goes through the glazing is known as noticeable light transmittance (VLT) or visible transmittance (VT).

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The U worth for windows (expressed as Uw), explains 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 much better its insulating worth.

For example, 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 with 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 space 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 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 sunlight flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends to your house 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 called the angle of incidence.

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