What Are Double Glazed Windows? - Build in Wattle Grove Perth

Glazing just suggests the windows in your house, including both openable and fixed windows, as well as doors with glass and skylights. Glazing actually simply suggests the glass part, however it is normally used to refer to all aspects of an assembly including glass, films, frames and home furnishings. Focusing on all of these elements will assist you to achieve efficient passive style.

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Energy-efficient glazing makes your house more comfortable and dramatically decreases your energy expenses. However, improper or inadequately developed glazing can be a major source of unwanted heat gain in summertime and significant heat loss and condensation in winter season. Approximately 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a substantial investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can greatly decrease 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. Understanding a few of the crucial properties of glass will assist you to pick the finest glazing for your home. Key properties of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is called visible light transmittance (VLT) or noticeable transmittance (VT).

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

For instance, if your house has 70m2 of glazing with aluminium frames and clear glass with a U value of 6. 2W/m2 C, on a winter season'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 equivalent to the total heat output of a large room gas heating system or a 6.

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If you select a window with half the U worth (3. 1W/m2 C) (for instance, 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) determines 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 your house interior. Glazing makers declare an SHGC for each window type and design. Nevertheless, the actual SHGC for windows is affected by the angle that solar radiation strikes the glass. This is known as the angle of incidence.

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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 producers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.