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Glazing simply means the windows in your house, including both openable and set windows, along with doors with glass and skylights. Glazing really simply means the glass part, however it is normally used to refer to all elements of an assembly consisting of glass, films, frames and furnishings. Taking note of all of these elements will assist you to attain effective passive style.

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Energy-efficient glazing makes your home more comfortable and considerably reduces your energy costs. Inappropriate or badly designed glazing can be a significant source of undesirable heat gain in summer season and considerable heat loss and condensation in winter season. As much as 87% of a home's heating energy can be gained and up to 40% lost through windows.

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Glazing is a significant financial investment in the quality of your home. A preliminary financial investment in energy-efficient windows, skylights and doors can considerably reduce your yearly heating and cooling expense.

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

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The U worth for windows (expressed as Uw), describes the conduction of the whole window (glass and frame together). The lower the U worth, the higher 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's night when it is 15C chillier outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the total heat output of a big room 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 halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (expressed as SHGCw) measures how easily heat from direct sunshine flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to the house interior. The actual 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 maximum possible solar heat gain. The SHGC stated by glazing producers is constantly determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is transmitted.