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Glazing just suggests the windows in your home, including both openable and fixed windows, along with doors with glass and skylights. Glazing really just implies the glass part, but it is typically used to refer to all elements of an assembly including glass, movies, frames and home furnishings. Focusing on all of these aspects will assist you to attain effective passive design.

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Energy-efficient glazing makes your house more comfortable and considerably lowers your energy expenses. Nevertheless, unsuitable or badly created glazing can be a significant source of unwanted heat gain in summer season and significant heat loss and condensation in winter season. Up to 87% of a home's heating energy can be gotten and up to 40% lost through windows.

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Glazing is a substantial financial investment in the quality of your house. An initial financial investment in energy-efficient windows, skylights and doors can greatly lower your annual heating and cooling costs.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending a few of the crucial homes of glass will assist you to pick the best glazing for your home. Key homes of glass Source: Adapted from the Australian Window Association The quantity of light that travels through the glazing is known as visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to switch on lights, which will lead to greater energy costs. Conduction is how easily a product carries out heat. This is called 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 higher a window's resistance to heat circulation and the better its insulating value.

If your home has 70m2 of glazing with aluminium frames and clear glass with a U value of 6. 2W/m2 C, on a winter's night when it is 15C colder 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 space gas heating system or a 6.

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If you select 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 halve the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) measures 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 transmits to the house interior. Glazing manufacturers state an SHGC for each window type and style. Nevertheless, the actual SHGC for windows is affected by the angle that solar radiation strikes the glass. This is referred to as the angle of incidence.

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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 declared by glazing makers is always calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is reflected, and less is sent.