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Glazing merely implies the windows in your house, including both openable and fixed windows, as well as doors with glass and skylights. Glazing actually just means the glass part, but it is typically used to describe all elements of an assembly consisting of glass, movies, frames and furnishings. Taking notice of all of these elements will help you to achieve efficient passive design.

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Energy-efficient glazing makes your home more comfortable and drastically lowers your energy expenses. Improper or inadequately designed glazing can be a major source of undesirable heat gain in summer season and significant heat loss and condensation in winter. As much as 87% of a home's heating energy can be gained and up to 40% lost through windows.

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Glazing is a significant investment in the quality of your house. An initial investment in energy-efficient windows, skylights and doors can considerably lower your yearly 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 pick the very best glazing for your home. Secret residential or commercial 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 visible transmittance (VT).

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This may lead you to change on lights, which will lead to greater energy costs. Conduction is how readily a material conducts heat. This is called the U worth. The U worth for windows (expressed as Uw), explains the conduction of the entire window (glass and frame together). The lower the U worth, the higher a window's resistance to heat circulation and the 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 season'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 large space gas heating unit or a 6.

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If you select a window with half the U value (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 sends to the house interior. The real 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 manufacturers is always computed as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is transferred.