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Glazing merely implies the windows in your home, consisting of both openable and set windows, as well as doors with glass and skylights. Glazing really just means the glass part, but it is typically utilized to describe all elements of an assembly including glass, films, frames and furnishings. Focusing on all of these elements will assist you to achieve effective passive style.

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Energy-efficient glazing makes your home more comfy and dramatically reduces your energy costs. Nevertheless, unsuitable or badly designed glazing can be a major source of undesirable heat gain in summertime and considerable heat loss and condensation in winter season. As much as 87% of a home's heating energy can be gotten and up to 40% lost through windows.

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Glazing is a substantial investment in the quality of your home. The cost of glazing and the expense of heating and cooling your home are carefully associated. An initial financial investment in energy-efficient windows, skylights and doors can considerably lower your yearly cooling and heating costs. Energy-efficient glazing also decreases the peak heating and cooling load, which can lower the needed size of an air-conditioning system by 30%, resulting in further expense savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding some of the key properties of glass will help you to choose the best glazing for your house. Secret homes of glass Source: Adjusted from the Australian Window Association The amount of light that goes through the glazing is understood as visible light transmittance (VLT) or noticeable 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 value, the higher a window's resistance to heat circulation 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 value of 6. 2W/m2 C, on a winter season's night when it is 15C cooler outside compared with inside, 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 system 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 halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) determines how easily heat from direct sunshine streams through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to the home interior. The real 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 optimum possible solar heat gain. The SHGC stated by glazing producers is always computed as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transferred.