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Glazing merely indicates the windows in your house, consisting of both openable and fixed windows, along with doors with glass and skylights. Glazing actually just means the glass part, but it is generally utilized to refer to all aspects of an assembly including glass, movies, frames and furnishings. Taking note of all of these elements will assist you to attain reliable passive design.

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Energy-efficient glazing makes your home more comfy and dramatically decreases your energy expenses. Unsuitable or poorly developed glazing can be a major source of undesirable heat gain in summertime and substantial heat loss and condensation in winter. 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 considerable investment in the quality of your home. An initial financial investment in energy-efficient windows, skylights and doors can considerably decrease 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 some of the key properties of glass will help you to select the best glazing for your home. Secret properties of glass Source: Adapted from the Australian Window Association The amount of light that goes through the glazing is referred to as noticeable light transmittance (VLT) or visible 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 worth, 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 chillier outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a large room gas heating system 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 cut in half 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 sunlight flows through an entire window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the house interior. The real 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 declared by glazing producers is constantly calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transferred.