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Glazing simply means the windows in your home, consisting of both openable and fixed windows, along with doors with glass and skylights. Glazing really just suggests the glass part, however it is generally used to describe all aspects of an assembly consisting of glass, movies, 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 comfy and dramatically minimizes your energy expenses. However, improper or improperly designed glazing can be a significant source of unwanted heat gain in summer and substantial heat loss and condensation in winter season. As much as 87% of a house'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 reduce your yearly heating and cooling bill.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Comprehending some of the key properties of glass will help you to select the finest glazing for your house. Key properties of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is known as visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to turn on lights, which will result in greater energy costs. Conduction is how easily a product performs heat. This is called the U value. The U value 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 value.

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 season's night when it is 15C chillier outside compared with inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the total heat output of a large space gas heater or a 6.

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If you choose 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 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 sunlight flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the home interior. The real SHGC for windows is affected 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 stated by glazing makers is constantly determined as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is transferred.