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Glazing simply implies the windows in your house, including both openable and set windows, as well as doors with glass and skylights. Glazing in fact just implies the glass part, however it is typically used to describe all elements of an assembly consisting of glass, films, frames and home furnishings. Taking note of all of these elements will assist you to accomplish effective passive style.

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Energy-efficient glazing makes your home more comfortable and considerably minimizes your energy costs. Unsuitable or poorly designed glazing can be a major source of undesirable heat gain in summertime and significant heat loss and condensation in winter season. As much as 87% of a home'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 home. An initial financial investment in energy-efficient windows, skylights and doors can considerably minimize your yearly heating and cooling costs.

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This tool compares window choices to a base level aluminium window with 3mm clear glass. Understanding some of the essential properties of glass will assist you to pick the very best glazing for your house. Key homes of glass Source: Adjusted from the Australian Window Association The quantity of light that passes through the glazing is referred to as visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to switch on lights, which will result in greater energy expenses. Conduction is how readily a product performs heat. This is known as the U worth. 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 higher a window's resistance to heat circulation and the better its insulating worth.

For example, 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 colder outside compared with inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the overall heat output of a large space gas heating unit 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) measures how readily heat from direct sunshine streams through a whole 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 incidence of 0 and the window will experience the maximum possible solar heat gain. The SHGC declared by glazing producers is always calculated as having a 0 angle of occurrence. As the angle increases, more solar radiation is shown, and less is sent.