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Glazing just means the windows in your home, consisting of both openable and fixed windows, in addition to doors with glass and skylights. Glazing actually simply implies the glass part, but it is generally utilized to describe all elements of an assembly consisting of glass, movies, frames and home furnishings. Taking note of all of these elements will assist you to achieve reliable passive design.

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Energy-efficient glazing makes your home more comfy and drastically reduces your energy costs. However, unsuitable or badly designed glazing can be a significant source of unwanted heat gain in summertime and significant heat loss and condensation in winter. Approximately 87% of a house's heating energy can be acquired 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 significantly minimize your yearly heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending some of the key properties of glass will assist you to choose the very best glazing for your home. Key residential or commercial properties of glass Source: Adjusted from the Australian Window Association The quantity of light that goes through the glazing is called 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 higher a window's resistance to heat flow and the better its insulating worth.

For instance, 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 big space gas heater or a 6.

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If you pick a window with half the U value (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 transfers to the house interior. The real SHGC for windows is impacted 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 occurrence of 0 and the window will experience the maximum possible solar heat gain. The SHGC stated by glazing manufacturers is always computed as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is sent.