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Glazing just implies the windows in your home, consisting of both openable and fixed windows, along with doors with glass and skylights. Glazing in fact just means the glass part, but it is typically utilized to describe all elements of an assembly consisting of glass, films, 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 home more comfy and significantly reduces your energy expenses. Unsuitable or inadequately designed glazing can be a significant source of undesirable heat gain in summertime and significant heat loss and condensation in winter. Up to 87% of a house's heating energy can be gained and approximately 40% lost through windows.

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Glazing is a significant investment in the quality of your home. The cost of glazing and the expense of heating and cooling your home are carefully related. An initial financial investment in energy-efficient windows, skylights and doors can considerably decrease your yearly heating and cooling bill. Energy-efficient glazing also minimizes the peak heating and cooling load, which can minimize the needed size of an air-conditioning system by 30%, leading to additional cost 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 essential properties of glass will assist you to pick the very best glazing for your house. Secret residential or commercial properties of glass Source: Adapted from the Australian Window Association The quantity of light that goes through the glazing is referred to as visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to change on lights, which will lead to higher energy costs. Conduction is how easily a material conducts heat. This is called the U worth. The U worth for windows (revealed as Uw), explains the conduction of the entire window (glass and frame together). The lower the U value, the higher a window's resistance to heat flow and the much better its insulating worth.

For example, 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 season's night when it is 15C colder outside compared with indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the overall heat output of a big space gas heater or a 6.

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If you choose 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 (expressed as SHGCw) determines how easily heat from direct sunshine flows through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transmits to the home interior. Glazing makers state an SHGC for each window type and style. 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 incidence 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 incidence. As the angle increases, more solar radiation is reflected, and less is transmitted.