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Glazing simply indicates the windows in your home, consisting of both openable and fixed windows, as well as doors with glass and skylights. Glazing in fact just indicates the glass part, however it is typically used to describe all aspects of an assembly consisting of glass, movies, frames and furnishings. Taking note of all of these aspects will help you to attain effective passive style.

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Energy-efficient glazing makes your home more comfy and significantly reduces your energy costs. Unsuitable or badly created glazing can be a major source of unwanted heat gain in summertime 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 financial investment in the quality of your home. The cost of glazing and the cost of heating and cooling your home are closely related. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly minimize your annual heating & cooling costs. Energy-efficient glazing likewise lowers the peak heating and cooling load, which can minimize the required size of an air-conditioning system by 30%, leading to more cost savings.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending some of the crucial properties of glass will help you to pick the very best glazing for your house. Secret properties 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 may lead you to turn on lights, which will lead to higher energy costs. Conduction is how readily a material carries out heat. This is called the U value. The U value for windows (revealed 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 value.

For example, 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 big space gas heater or a 6.

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If you choose 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 (expressed as SHGCw) measures 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 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 optimum possible solar heat gain. The SHGC declared by glazing producers is constantly determined as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transmitted.