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Glazing merely indicates the windows in your house, including both openable and fixed windows, in addition to doors with glass and skylights. Glazing really just indicates the glass part, however it is normally used to refer to all aspects of an assembly consisting of glass, movies, frames and furnishings. Taking notice of all of these elements will assist you to accomplish efficient passive design.

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Energy-efficient glazing makes your home more comfortable and significantly decreases your energy costs. Nevertheless, unsuitable or improperly developed glazing can be a significant source of undesirable heat gain in summer season and significant heat loss and condensation in winter. Approximately 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a substantial investment in the quality of your home. An initial investment in energy-efficient windows, skylights and doors can greatly reduce your annual heating and cooling bill.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the key properties of glass will help you to choose the 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 understood as noticeable light transmittance (VLT) or visible transmittance (VT).

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This may lead you to switch on lights, which will result in greater energy costs. Conduction is how readily a product performs heat. This is known as the U worth. The U value for windows (revealed 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 better its insulating value.

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's night when it is 15C chillier outside compared to inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a large space gas heating unit or a 6.

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If you choose 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 halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) determines how readily heat from direct sunshine streams through an entire window (glass and frame together).

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

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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 manufacturers is always determined as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transferred.