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Glazing simply indicates the windows in your house, consisting of both openable and set windows, along with doors with glass and skylights. Glazing actually just suggests the glass part, however it is typically used to describe all elements of an assembly consisting of glass, films, frames and home furnishings. Focusing on all of these aspects will assist you to attain efficient passive style.

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Energy-efficient glazing makes your home more comfortable and considerably decreases your energy costs. Improper or improperly designed 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 house's heating energy can be gained and as much as 40% lost through windows.

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Glazing is a substantial financial investment in the quality of your home. A preliminary financial investment in energy-efficient windows, skylights and doors can significantly lower your annual heating and cooling expense.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding a few of the key homes of glass will assist you to pick the very best glazing for your home. Key properties of glass Source: Adapted from the Australian Window Association The quantity of light that passes through the glazing is called 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 worth, the higher a window's resistance to heat circulation and the much better its insulating worth.

For instance, if your home 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 inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the total heat output of a big room gas heating system 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 (revealed as SHGCw) measures 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 transmits to your house interior. Glazing producers state an SHGC for each window type and style. However, the actual SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is referred to as the angle of incidence.

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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 maximum possible solar heat gain. The SHGC declared by glazing producers is always determined as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transmitted.