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Glazing merely suggests the windows in your house, including both openable and set windows, as well as doors with glass and skylights. Glazing really simply indicates the glass part, however it is typically used to describe all elements of an assembly consisting of glass, movies, frames and furnishings. Taking notice of all of these elements will assist you to achieve efficient passive style.

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Energy-efficient glazing makes your home more comfortable and considerably minimizes your energy costs. Improper or poorly designed glazing can be a major source of unwanted heat gain in summertime and considerable heat loss and condensation in winter. As much as 87% of a home's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a substantial financial investment in the quality of your house. The expense of glazing and the cost of heating and cooling your house are closely related. A preliminary investment in energy-efficient windows, skylights and doors can greatly lower your yearly heating and cooling costs. Energy-efficient glazing also reduces the peak heating and cooling load, which can decrease the required size of an air-conditioning system by 30%, leading to additional expense savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the key residential or commercial properties of glass will assist you to select the very best glazing for your house. Secret homes of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is understood as noticeable light transmittance (VLT) or noticeable transmittance (VT).

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The U value for windows (revealed as Uw), explains 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 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 season's night when it is 15C colder outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a large space gas heating system 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 easily heat from direct sunlight streams through an entire 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 calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is sent.