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Glazing simply means the windows in your house, consisting of both openable and fixed windows, in addition to doors with glass and skylights. Glazing really simply implies the glass part, but it is usually utilized to describe all elements of an assembly including glass, films, frames and furnishings. Taking notice of all of these aspects will help you to accomplish effective passive design.

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Energy-efficient glazing makes your house more comfy and drastically decreases your energy expenses. However, improper or inadequately created 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 up to 40% lost through windows.

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Glazing is a significant financial investment in the quality of your home. The expense of glazing and the cost of heating and cooling your house are closely associated. A preliminary investment in energy-efficient windows, skylights and doors can considerably reduce your annual heating & cooling bill. Energy-efficient glazing also lowers the peak heating and cooling load, which can reduce the needed size of an air-conditioning system by 30%, causing more cost savings.

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

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The U worth 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 much better its insulating value.

For example, if your home 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 comparable to the overall heat output of a big space gas heating system 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 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 transfers to your home interior. Glazing producers state an SHGC for each window type and design. However, the actual SHGC for windows is impacted 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 stated by glazing manufacturers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transmitted.