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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 just implies the glass part, however it is usually utilized to describe all aspects of an assembly including glass, films, frames and furnishings. Paying attention to all of these aspects will assist you to attain effective passive style.

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Energy-efficient glazing makes your house more comfortable and drastically minimizes your energy costs. Nevertheless, inappropriate or poorly developed glazing can be a significant source of unwanted heat gain in summertime and considerable heat loss and condensation in winter. Approximately 87% of a home's heating energy can be gained and up to 40% lost through windows.

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Glazing is a significant financial investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can considerably lower 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. Comprehending a few of the essential properties of glass will help you to select the best glazing for your home. Key residential or commercial properties of glass Source: Adapted from the Australian Window Association The amount of light that passes through the glazing is called noticeable light transmittance (VLT) or noticeable transmittance (VT).

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The U worth for windows (revealed as Uw), describes 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 much better its insulating value.

If your home 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 total heat output of a large 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 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 flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the house interior. The actual SHGC for windows is impacted 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 incidence of 0 and the window will experience the optimum possible solar heat gain. The SHGC declared by glazing makers is constantly computed as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transferred.