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Glazing merely indicates the windows in your house, including both openable and set windows, as well as doors with glass and skylights. Glazing actually just implies the glass part, but it is generally utilized to describe all aspects of an assembly consisting of glass, films, frames and furnishings. Taking note of all of these elements will help you to attain efficient passive design.

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Energy-efficient glazing makes your home more comfy and significantly lowers your energy costs. However, inappropriate or badly developed glazing can be a major source of undesirable heat gain in summer and substantial heat loss and condensation in winter. Up to 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a considerable investment in the quality of your house. An initial investment in energy-efficient windows, skylights and doors can significantly minimize your annual heating and cooling costs.

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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 properties of glass will assist you to pick the very best glazing for your house. Key properties of glass Source: Adapted from the Australian Window Association The quantity of light that passes through the glazing is known as noticeable light transmittance (VLT) or visible transmittance (VT).

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The U value for windows (expressed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U value, the higher a window's resistance to heat flow and the better its insulating worth.

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 season'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 total heat output of a large space gas heating unit 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 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 sunshine 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 actual SHGC for windows is impacted 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 occurrence of 0 and the window will experience the maximum possible solar heat gain. The SHGC declared by glazing makers is constantly calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is sent.