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Glazing just indicates the windows in your house, including both openable and set windows, in addition to doors with glass and skylights. Glazing really simply indicates the glass part, but it is usually used to refer to all aspects of an assembly consisting of glass, movies, frames and furnishings. Taking notice of all of these aspects will help you to accomplish efficient passive style.

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Energy-efficient glazing makes your house more comfy and dramatically decreases your energy costs. Inappropriate or poorly designed glazing can be a significant source of unwanted heat gain in summer season and substantial heat loss and condensation in winter. Up to 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 house. The expense of glazing and the cost of heating and cooling your home are carefully related. A preliminary investment in energy-efficient windows, skylights and doors can greatly reduce your annual heating & cooling costs. Energy-efficient glazing likewise minimizes the peak heating and cooling load, which can minimize the required size of an air-conditioning system by 30%, leading to more cost savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the essential properties of glass will assist 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 passes through the glazing is called visible light transmittance (VLT) or visible transmittance (VT).

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The U value for windows (revealed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U value, the greater a window's resistance to heat circulation and the much 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 colder outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the total 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 gap and less-conductive frames), you can halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (expressed as SHGCw) measures how easily heat from direct sunshine flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the home interior. Glazing makers state an SHGC for each window type and design. However, 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 incidence of 0 and the window will experience the optimum possible solar heat gain. The SHGC stated by glazing manufacturers is always computed as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.