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Glazing just implies the windows in your house, including both openable and set windows, in addition to doors with glass and skylights. Glazing really simply suggests the glass part, however it is normally used to describe all elements of an assembly consisting of glass, films, frames and home furnishings. Focusing on all of these elements will assist you to accomplish reliable passive style.

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Energy-efficient glazing makes your house more comfy and significantly decreases your energy expenses. However, inappropriate or badly created glazing can be a significant source of undesirable heat gain in summer and substantial heat loss and condensation in winter. Approximately 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a considerable financial investment in the quality of your home. The cost of glazing and the cost of heating and cooling your home are carefully related. A preliminary investment in energy-efficient windows, skylights and doors can significantly decrease your annual heating & cooling expense. Energy-efficient glazing also lowers the peak heating and cooling load, which can reduce the required size of an air-conditioning system by 30%, causing further expense savings.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding a few of the key homes of glass will help you to select the very best glazing for your home. Key properties of glass Source: Adapted from the Australian Window Association The quantity of light that passes through the glazing is referred to as visible light transmittance (VLT) or visible transmittance (VT).

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This may lead you to turn on lights, which will lead to higher energy costs. Conduction is how readily a product conducts heat. This is referred to as the U worth. The U worth for windows (expressed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U value, the greater a window's resistance to heat circulation and the much better its insulating value.

For example, 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 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 pick a window with half the U value (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 (revealed as SHGCw) measures how easily heat from direct sunlight flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends 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 occurrence of 0 and the window will experience the optimum possible solar heat gain. The SHGC stated by glazing producers is always determined as having a 0 angle of occurrence. As the angle increases, more solar radiation is reflected, and less is sent.