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Glazing just means the windows in your house, consisting of both openable and set windows, in addition to doors with glass and skylights. Glazing in fact simply indicates the glass part, but it is typically utilized to describe all aspects of an assembly including glass, movies, frames and home furnishings. Taking notice of all of these aspects will help you to accomplish efficient passive design.

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Energy-efficient glazing makes your home more comfortable and significantly reduces your energy costs. However, improper or improperly designed glazing can be a significant source of unwanted heat gain in summertime and significant heat loss and condensation in winter season. Approximately 87% of a home's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a significant investment in the quality of your home. An initial investment in energy-efficient windows, skylights and doors can greatly lower your yearly heating and cooling expense.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the crucial homes of glass will help you to choose the very best glazing for your home. Secret homes 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 (expressed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U value, the higher 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 worth of 6. 2W/m2 C, on a winter's night when it is 15C chillier outside compared with 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 space gas heating unit 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 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 (expressed as SHGCw) determines how readily 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 your home interior. Glazing manufacturers state an SHGC for each window type and design. Nevertheless, the actual SHGC for windows is affected by the angle that solar radiation strikes the glass. This is referred to as the angle of incidence.

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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 declared by glazing makers is constantly calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.