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Glazing merely means the windows in your house, consisting of both openable and fixed windows, as well as doors with glass and skylights. Glazing in fact just suggests the glass part, but it is usually used to refer to all aspects of an assembly including glass, films, frames and furnishings. Taking notice of all of these elements will help you to accomplish reliable passive style.

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Energy-efficient glazing makes your home more comfy and drastically reduces your energy expenses. Inappropriate or badly created glazing can be a major source of undesirable heat gain in summer season and significant heat loss and condensation in winter. Approximately 87% of a home's heating energy can be acquired and as much as 40% lost through windows.

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Glazing is a considerable investment in the quality of your house. A preliminary financial investment in energy-efficient windows, skylights and doors can considerably reduce your annual heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding some of the key homes of glass will help you to pick the best glazing for your house. Key residential or commercial properties of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is referred to as visible light transmittance (VLT) or noticeable transmittance (VT).

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This may lead you to turn on lights, which will lead to greater energy costs. Conduction is how easily a material conducts heat. This is understood as the U value. The U value for windows (revealed as Uw), explains the conduction of the entire window (glass and frame together). The lower the U value, the higher a window's resistance to heat flow and the much better its insulating value.

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'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 comparable to the overall heat output of a large room gas heating system or a 6.

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If you select a window with half the U value (3. 1W/m2 C) (for instance, 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 (expressed as SHGCw) measures how readily heat from direct sunshine 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 design. Nevertheless, the real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is called 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 stated by glazing makers is always determined as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transmitted.