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

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Energy-efficient glazing makes your house more comfortable and drastically minimizes your energy costs. However, improper or badly created glazing can be a major source of undesirable heat gain in summertime and considerable heat loss and condensation in winter season. Approximately 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a substantial financial investment in the quality of your house. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly minimize 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 key homes of glass will assist you to pick the best glazing for your home. Key properties of glass Source: Adjusted from the Australian Window Association The amount of light that travels through the glazing is called noticeable light transmittance (VLT) or noticeable 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 greater a window's resistance to heat flow and the better its insulating worth.

For instance, if your house 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 total heat output of a big room gas heating unit or a 6.

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If you pick a window with half the U value (3. 1W/m2 C) (for example, double glazing with an argon-filled space 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 the home interior. Glazing producers 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 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 makers is constantly calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transferred.