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

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Energy-efficient glazing makes your home more comfortable and significantly decreases your energy costs. However, improper or inadequately developed glazing can be a significant source of undesirable heat gain in summertime and significant heat loss and condensation in winter. Approximately 87% of a home's heating energy can be gotten and as much as 40% lost through windows.

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Glazing is a significant investment in the quality of your house. A preliminary investment in energy-efficient windows, skylights and doors can greatly lower your yearly heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding a few of the crucial residential or commercial properties of glass will help you to select the finest 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 referred to as noticeable light transmittance (VLT) or visible transmittance (VT).

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This may lead you to switch on lights, which will lead to higher energy expenses. Conduction is how readily a material carries out heat. This is referred to as the U value. The U worth for windows (revealed as Uw), describes the conduction of the entire window (glass and frame together). The lower the U worth, the greater a window's resistance to heat circulation and the 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 season'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 overall heat output of a large room 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 example, double glazing with an argon-filled space 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 easily 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. The actual SHGC for windows is affected 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 makers is always computed as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transferred.