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Glazing merely suggests the windows in your home, including both openable and fixed windows, in addition to doors with glass and skylights. Glazing really simply suggests the glass part, but it is generally used to refer to all aspects of an assembly including glass, films, frames and furnishings. Focusing on all of these aspects will help you to accomplish efficient passive design.

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Energy-efficient glazing makes your house more comfortable and drastically decreases your energy costs. Nevertheless, unsuitable or inadequately created glazing can be a significant source of unwanted heat gain in summer and substantial 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 financial investment in the quality of your home. An initial financial investment in energy-efficient windows, skylights and doors can greatly lower your yearly heating and cooling bill.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending some of the crucial homes of glass will assist you to choose the very best glazing for your house. Secret residential or commercial properties of glass Source: Adjusted from the Australian Window Association The quantity of light that travels through the glazing is called visible light transmittance (VLT) or visible transmittance (VT).

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This might lead you to change on lights, which will lead to higher energy expenses. Conduction is how easily a material carries out heat. This is understood as the U value. The U worth for windows (revealed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U worth, the greater a window's resistance to heat flow and the better its insulating value.

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 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 total heat output of a big space gas heating unit or a 6.

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If you choose a window with half the U worth (3. 1W/m2 C) (for instance, double glazing with an argon-filled space and less-conductive frames), you can halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) determines how readily heat from direct sunlight streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends to your house interior. Glazing manufacturers declare an SHGC for each window type and style. The real SHGC for windows is affected 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 declared by glazing manufacturers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is transferred.