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Glazing simply indicates the windows in your house, including both openable and set windows, as well as doors with glass and skylights. Glazing in fact just means the glass part, however it is typically utilized to describe all aspects of an assembly consisting of glass, films, frames and home furnishings. Paying attention to all of these aspects will assist you to attain reliable passive design.

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Energy-efficient glazing makes your house more comfortable and significantly reduces your energy expenses. Nevertheless, unsuitable or inadequately developed glazing can be a significant source of undesirable heat gain in summer season and considerable heat loss and condensation in winter. Up to 87% of a home's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a significant financial investment in the quality of your home. The cost of glazing and the expense of heating and cooling your home are carefully related. A preliminary investment in energy-efficient windows, skylights and doors can significantly reduce your yearly cooling and heating costs. Energy-efficient glazing also lowers the peak heating and cooling load, which can minimize the needed size of an air-conditioning system by 30%, resulting in further cost savings.

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

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The U value for windows (expressed as Uw), describes the conduction of the whole window (glass and frame together). The lower the U worth, the higher a window's resistance to heat circulation and the much better its insulating worth.

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 season'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 heating unit or a 6.

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If you choose a window with half the U worth (3. 1W/m2 C) (for example, 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 easily heat from direct sunshine flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends to your home interior. Glazing producers declare an SHGC for each window type and style. The real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is referred to as 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 producers is constantly calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transferred.