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Glazing just implies the windows in your house, consisting of both openable and set windows, along with doors with glass and skylights. Glazing actually just suggests the glass part, however it is usually used to describe all elements of an assembly consisting of glass, movies, frames and home furnishings. Paying attention to all of these aspects will assist you to accomplish effective passive design.

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Energy-efficient glazing makes your home more comfortable and drastically minimizes your energy expenses. Inappropriate or inadequately developed glazing can be a significant source of undesirable heat gain in summer and substantial heat loss and condensation in winter season. Up to 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 home. An initial investment in energy-efficient windows, skylights and doors can significantly minimize your annual heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding a few of the crucial residential or commercial properties of glass will assist you to select the best glazing for your home. Key homes of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is referred to as noticeable light transmittance (VLT) or visible transmittance (VT).

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

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 season'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 equivalent to the overall heat output of a big room gas heater 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 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 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 makers state 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 called 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 optimum possible solar heat gain. The SHGC declared by glazing makers is constantly determined as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is sent.