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Glazing merely implies the windows in your home, consisting of both openable and fixed windows, in addition to doors with glass and skylights. Glazing in fact just implies the glass part, however it is usually used to describe all aspects of an assembly consisting of glass, films, frames and home furnishings. Taking notice of all of these elements will help you to achieve reliable passive design.

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Energy-efficient glazing makes your house more comfy and considerably lowers your energy expenses. However, unsuitable or improperly designed glazing can be a major source of undesirable heat gain in summertime and significant heat loss and condensation in winter season. Up to 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 house. An initial financial investment in energy-efficient windows, skylights and doors can significantly decrease 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 crucial residential or commercial properties of glass will help you to choose the very best glazing for your house. Secret homes of glass Source: Adjusted from the Australian Window Association The quantity of light that travels through the glazing is called noticeable light transmittance (VLT) or noticeable 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 higher a window's resistance to heat circulation 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 worth of 6. 2W/m2 C, on a winter's night when it is 15C cooler outside compared to inside, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the overall heat output of a large room gas heating system 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) measures 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 sends to your house interior. Glazing makers declare an SHGC for each window type and style. The real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is referred to as the angle of occurrence.

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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 stated by glazing makers is always computed as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transferred.