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Glazing simply means the windows in your house, consisting of both openable and set windows, as well as doors with glass and skylights. Glazing in fact just suggests the glass part, however it is usually used to describe all elements of an assembly including glass, movies, frames and home furnishings. Paying attention to all of these elements will help you to attain reliable passive design.

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Energy-efficient glazing makes your house more comfortable and significantly reduces your energy expenses. Unsuitable or inadequately developed glazing can be a significant source of unwanted heat gain in summer and significant 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 investment in the quality of your home. The cost of glazing and the expense of heating and cooling your house are carefully related. A preliminary investment in energy-efficient windows, skylights and doors can greatly decrease your yearly cooling and heating bill. Energy-efficient glazing likewise reduces the peak heating and cooling load, which can minimize the required size of an air-conditioning system by 30%, resulting in additional cost savings.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding a few of the key homes of glass will assist you to pick the best glazing for your home. Key residential or commercial properties of glass Source: Adjusted from the Australian Window Association The quantity of light that travels through the glazing is understood as visible light transmittance (VLT) or visible transmittance (VT).

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This may lead you to switch on lights, which will lead to higher energy costs. Conduction is how readily a material carries out heat. This is referred to as the U worth. The U worth for windows (revealed as Uw), describes the conduction of the entire window (glass and frame together). The lower the U worth, the greater a window's resistance to heat flow and the better its insulating value.

For instance, 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 to inside your home, 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 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 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) determines how readily heat from direct sunshine streams through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends to the house interior. Glazing makers state an SHGC for each window type and design. The real SHGC for windows is impacted by the angle that solar radiation strikes the glass. This is called 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 maximum 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 transmitted.