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Glazing merely suggests the windows in your home, including both openable and set windows, in addition to doors with glass and skylights. Glazing actually just suggests the glass part, however it is normally used to describe all aspects of an assembly including glass, films, frames and home furnishings. Focusing on all of these elements will help you to attain efficient passive design.

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Energy-efficient glazing makes your house more comfy and drastically reduces your energy expenses. Inappropriate or improperly developed glazing can be a significant source of unwanted heat gain in summer season and considerable heat loss and condensation in winter season. As much as 87% of a house's heating energy can be gained 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 decrease your annual heating and cooling expense.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding some of the crucial residential or commercial properties of glass will assist you to select the very best glazing for your house. Key residential or commercial properties of glass Source: Adapted from the Australian Window Association The amount 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), explains the conduction of the whole window (glass and frame together). The lower the U worth, the higher a window's resistance to heat circulation and the much better its insulating worth.

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 to inside your home, 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 heating system or a 6.

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If you select a window with half the U worth (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 (revealed as SHGCw) measures how readily heat from direct sunlight streams 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 actual 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 declared by glazing producers is constantly determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transmitted.