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Glazing merely means the windows in your house, consisting of both openable and set windows, along with doors with glass and skylights. Glazing really simply suggests the glass part, however it is typically utilized to describe all aspects of an assembly consisting of glass, movies, frames and home furnishings. Taking note of all of these aspects will help you to accomplish reliable passive design.

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Energy-efficient glazing makes your home more comfortable and significantly minimizes your energy costs. Nevertheless, inappropriate or poorly developed glazing can be a major source of undesirable heat gain in summer and considerable heat loss and condensation in winter season. As much as 87% of a house's heating energy can be gotten and approximately 40% lost through windows.

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Glazing is a considerable investment in the quality of your house. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly lower your annual heating and cooling expense.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding some of the essential properties of glass will help you to choose the very best glazing for your home. Secret homes of glass Source: Adapted from the Australian Window Association The amount of light that passes through the glazing is referred to as visible light transmittance (VLT) or visible transmittance (VT).

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

For instance, 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 cooler 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 room gas heating unit 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 (expressed as SHGCw) measures how easily heat from direct sunlight streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to your home interior. Glazing manufacturers declare an SHGC for each window type and design. The actual SHGC for windows is affected 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 maximum possible solar heat gain. The SHGC stated by glazing manufacturers is constantly calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is sent.