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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 simply implies the glass part, but it is typically utilized to describe all elements of an assembly including glass, movies, frames and furnishings. Paying attention to all of these elements will assist you to accomplish efficient passive design.

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Energy-efficient glazing makes your house more comfy and significantly lowers your energy expenses. Unsuitable or poorly designed glazing can be a significant source of undesirable heat gain in summer and substantial heat loss and condensation in winter season. As much as 87% of a house's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a substantial investment in the quality of your house. The cost of glazing and the cost of heating and cooling your house are carefully associated. An initial investment in energy-efficient windows, skylights and doors can considerably reduce your yearly heating and cooling bill. Energy-efficient glazing also minimizes the peak heating and cooling load, which can decrease the needed size of an air-conditioning system by 30%, resulting in more cost savings.

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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 help you to choose the very best glazing for your home. Secret residential or commercial properties of glass Source: Adapted from the Australian Window Association The quantity of light that passes through the glazing is known as visible light transmittance (VLT) or visible transmittance (VT).

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The U worth 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 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 value of 6. 2W/m2 C, on a winter's night when it is 15C cooler outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the overall heat output of a large space gas heater or a 6.

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If you pick a window with half the U worth (3. 1W/m2 C) (for example, double glazing with an argon-filled gap 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) determines how readily heat from direct sunshine streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to your house interior. Glazing producers declare an SHGC for each window type and style. However, the real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is known as the angle of incidence.

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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 calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transmitted.