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

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Energy-efficient glazing makes your home more comfortable and considerably reduces your energy costs. Nevertheless, improper or badly created glazing can be a major source of undesirable heat gain in summer and considerable heat loss and condensation in winter. Up to 87% of a house's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a considerable investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can significantly reduce your annual 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 residential or commercial properties of glass will help you to select the best glazing for your home. Secret residential or commercial properties of glass Source: Adjusted from the Australian Window Association The amount of light that passes through the glazing is understood as noticeable light transmittance (VLT) or noticeable 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 worth, the higher a window's resistance to heat circulation and the much better its insulating worth.

For instance, if your house 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 indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the total heat output of a large room gas heater 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) determines how easily heat from direct sunlight flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends 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 optimum possible solar heat gain. The SHGC declared by glazing manufacturers is always calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transferred.