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Glazing merely means the windows in your house, consisting of both openable and set windows, as well as doors with glass and skylights. Glazing in fact simply means the glass part, but it is typically used to refer to all aspects of an assembly including glass, movies, frames and home furnishings. Taking notice of all of these elements will assist you to attain efficient passive style.

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Energy-efficient glazing makes your house more comfortable and dramatically minimizes your energy expenses. However, inappropriate or improperly developed glazing can be a significant source of unwanted heat gain in summertime and substantial heat loss and condensation in winter. As much as 87% of a home's heating energy can be acquired and up to 40% lost through windows.

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Glazing is a significant financial investment in the quality of your home. An initial investment in energy-efficient windows, skylights and doors can considerably reduce your annual heating and cooling bill.

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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 homes of glass will assist you to choose the very best glazing for your house. Key homes of glass Source: Adapted from the Australian Window Association The quantity of light that travels through the glazing is understood as noticeable light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to switch on lights, which will result in higher energy expenses. Conduction is how easily a material carries out heat. This is called the U value. The U worth for windows (expressed as Uw), explains 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 better its insulating worth.

For instance, 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 colder outside compared with inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a big room gas heating unit or a 6.

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If you pick 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 (revealed 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 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 occurrence of 0 and the window will experience the optimum possible solar heat gain. The SHGC declared by glazing manufacturers is always determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is transferred.