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Glazing just indicates the windows in your home, consisting of both openable and fixed windows, along with doors with glass and skylights. Glazing in fact simply implies the glass part, but it is generally used to refer to all aspects of an assembly including glass, movies, frames and furnishings. Focusing on all of these elements will help you to accomplish effective passive style.

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Energy-efficient glazing makes your home more comfortable and dramatically decreases your energy expenses. Unsuitable or improperly designed glazing can be a major source of undesirable heat gain in summertime and substantial heat loss and condensation in winter season. Approximately 87% of a home'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 home. An initial investment in energy-efficient windows, skylights and doors can greatly minimize your annual heating and cooling expense.

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

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

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's night when it is 15C cooler outside compared with indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a large room gas heating system or a 6.

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If you pick a window with half the U worth (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 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 sends to the home interior. The actual SHGC for windows is affected 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 incidence of 0 and the window will experience the optimum possible solar heat gain. The SHGC stated by glazing producers is always computed as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is sent.