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That window can transfer more solar heat in winter than in summer season. A west-facing window on a summer's afternoon has an angle of incidence from near 0 up to 30 with a big efficient area of solar radiation. A north-facing window, in summertime, has a high angle of occurrence and a low efficient area of solar radiation, so can transfer less heat than a west-facing one.

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You can rapidly and easily improve the thermal efficiency of your home by replacing your windows. There are thousands of types of glass and frames to choose from.

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There are various types of glass products to select from. Single glazing utilizes a single pane of glass. Single glazing with clear glass is not really effective when it comes to heat loss or gain. To improve efficiency, you can use single glazing with a more energy-efficient kind of glass such as low emissivity (low-e) glass.

The energy performance of IGUs also depends on: the homes of each layer of glass. Different glass types (for example, clear and low-e glass) can be put together in an IGU.

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IGU cavities can be filled with air or a more inert, low-conductivity gas such as argon the width of the cavity. Wider cavities supply lower (better) U values, with 12mm typically accepted as the favored gap how well the cavity is sealed.

If argon is installed to the cavity in location of air, moisture is reliably left out the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers consists of a desiccant to soak up any moisture. Inadequate desiccant may trigger wetness to condense on the glass surface in cold conditions, reducing thermal efficiency.

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In truth, IGUs can deliver much better energy performance for all environments, especially in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing systems Low emissivity glass (typically known as low-e glass) minimizes heat transfer. Low-e glass might be either high or low transmission: High transmission low-e glass has a finish that permits daylight from the sun to pass into your house to accomplish great solar heat gain, but reduces the amount of the long wavelength infrared heat that can get away back through the window.

Low-e glass has either a pyrolytic finishing or a vacuum-deposited thin film metal finish. Pyrolytic coatings are resilient and can be utilized for any glazing; vacuum-deposited finishings are soft and are just utilized within IGUs. Low-e coatings can substantially enhance both U value and SHGC; however, they must be used properly or they will either deteriorate or fail to perform as required.

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Low-e finishings can be utilized in combination with clear, toned or reflective glass. Low-e coverings on glazing can reduce heat transfer where required Photo: Department of Industry, Science, Energy and Resources Toned glass has colouring ingredients included throughout manufacture. It is available in numerous colours, normally bronze, grey, blue and green.