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

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Energy-efficient glazing makes your house more comfortable and considerably lowers your energy costs. Inappropriate or poorly designed glazing can be a major source of unwanted heat gain in summertime and substantial heat loss and condensation in winter. Approximately 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 significant financial investment in the quality of your home. A preliminary investment in energy-efficient windows, skylights and doors can considerably reduce 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 crucial homes of glass will help you to select the very best glazing for your home. Secret residential or commercial properties of glass Source: Adjusted from the Australian Window Association The amount of light that travels through the glazing is known as visible light transmittance (VLT) or visible 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 value, the greater a window's resistance to heat flow and the better its insulating worth.

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 colder outside compared with 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 unit or a 6.

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If you choose 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 halve 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 streams through an entire window (glass and frame together).

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

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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 makers is constantly determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.