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Glazing just means the windows in your house, including both openable and set windows, along with doors with glass and skylights. Glazing in fact just suggests the glass part, but it is typically used to describe all aspects of an assembly consisting of glass, films, frames and furnishings. Taking note of all of these elements will help you to attain effective passive design.

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Energy-efficient glazing makes your home more comfy and significantly reduces your energy expenses. Inappropriate or badly designed glazing can be a significant source of unwanted heat gain in summer season and considerable heat loss and condensation in winter season. Approximately 87% of a house's heating energy can be gotten and approximately 40% lost through windows.

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Glazing is a considerable financial investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can considerably minimize 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. Comprehending a few of the key homes of glass will assist you to choose the best glazing for your home. Key homes of glass Source: Adapted from the Australian Window Association The amount of light that passes through the glazing is called visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to change on lights, which will lead to greater energy costs. Conduction is how readily a product performs heat. This is called the U worth. The U value for windows (expressed as Uw), describes the conduction of the entire window (glass and frame together). The lower the U value, the greater a window's resistance to heat flow and the much better its insulating worth.

For example, if your house has 70m2 of glazing with aluminium frames and clear glass with a U value of 6. 2W/m2 C, on a winter season's night when it is 15C cooler outside compared to inside, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the total heat output of a large room gas heating system or a 6.

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If you select 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 (expressed 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 the house 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 incidence of 0 and the window will experience the maximum possible solar heat gain. The SHGC stated by glazing makers is constantly determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is transferred.