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Glazing merely suggests the windows in your house, including both openable and set windows, in addition to doors with glass and skylights. Glazing actually simply indicates the glass part, but it is usually used to describe all aspects of an assembly including glass, films, frames and home furnishings. Taking notice of all of these aspects will assist you to attain effective passive design.

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Energy-efficient glazing makes your house more comfortable and considerably reduces your energy expenses. However, unsuitable or inadequately created glazing can be a major source of undesirable heat gain in summer and considerable heat loss and condensation in winter season. As much as 87% of a home's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a significant financial investment in the quality of your house. A preliminary investment in energy-efficient windows, skylights and doors can greatly decrease your yearly heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending some of the key residential or commercial properties of glass will help you to select the best glazing for your home. Key homes of glass Source: Adjusted from the Australian Window Association The quantity of light that passes through the glazing is known as visible light transmittance (VLT) or visible transmittance (VT).

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This might lead you to change on lights, which will lead to greater energy expenses. Conduction is how readily a product performs heat. This is called the U value. The U worth for windows (expressed as Uw), explains 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 better its insulating worth.

For instance, 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's night when it is 15C colder outside compared to inside, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the total heat output of a big space gas heating unit 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 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) determines how readily heat from direct sunlight flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to your house interior. Glazing manufacturers state an SHGC for each window type and design. However, the actual SHGC for windows is affected 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 constantly calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.