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Glazing merely suggests the windows in your home, including both openable and fixed windows, as well as doors with glass and skylights. Glazing in fact simply means the glass part, however it is usually utilized to describe all aspects of an assembly consisting of glass, films, frames and furnishings. Taking notice of all of these elements will help you to accomplish reliable passive style.

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

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Glazing is a substantial financial investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can considerably minimize your annual heating and cooling costs.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Comprehending some of the key residential or commercial properties of glass will assist you to pick the best glazing for your home. Key properties of glass Source: Adapted from the Australian Window Association The quantity of light that goes through the glazing is understood as noticeable light transmittance (VLT) or noticeable transmittance (VT).

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The U value 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 flow and the better its insulating worth.

For example, 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 season's night when it is 15C colder outside compared to inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent 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 worth (3. 1W/m2 C) (for instance, 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 (revealed as SHGCw) measures how easily heat from direct sunshine streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the home interior. Glazing manufacturers declare an SHGC for each window type and style. The real SHGC for windows is affected by the angle that solar radiation strikes the glass. This is referred to as the angle of occurrence.

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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 stated by glazing makers is constantly calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is sent.