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That window can send more solar heat in winter than in summer season. A west-facing window on a summer season's afternoon has an angle of incidence from near 0 approximately 30 with a big reliable area of solar radiation. A north-facing window, in summer season, has a high angle of incidence and a low efficient location 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 house by changing your windows. There are thousands of types of glass and frames to choose from.

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Single glazing with clear glass is not really efficient when it comes to heat loss or gain. To improve performance, you can use single glazing with a more energy-efficient type of glass such as low emissivity (low-e) glass.

Numerous layers can be put together with sealed cavities in between each sheet of glass. IGUs generally offer much better energy performance than single glazing, since they transfer less energy. The energy efficiency of IGUs also depends on: the homes of each layer of glass. Various glass types (for example, clear and low-e glass) can be assembled 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. Larger cavities supply lower (much better) U values, with 12mm usually accepted as the favored space how well the cavity is sealed.

If argon is installed to the cavity in location of air, moisture is dependably omitted the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers contains a desiccant to soak up any wetness. Insufficient desiccant may cause moisture to condense on the glass surface in cold conditions, lowering thermal performance.

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IGUs can provide better energy efficiency for all climates, especially in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing units Low emissivity glass (typically called low-e glass) lowers heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a coating that enables daylight from the sun to pass into your house to accomplish excellent solar heat gain, but decreases the amount of the long wavelength infrared heat that can escape back through the window.

Low-e glass has either a pyrolytic coating or a vacuum-deposited thin movie metal coating. Pyrolytic coverings are long lasting and can be used for any glazing; vacuum-deposited finishes are soft and are just utilized within IGUs. Low-e coverings can substantially enhance both U value and SHGC; however, they must be used properly or they will either deteriorate or stop working to carry out as required.

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Low-e coatings can be utilized in combination with clear, toned or reflective glass. Low-e coatings on glazing can minimize heat transfer where required Picture: Department of Market, Science, Energy and Resources Toned glass has colouring ingredients included throughout manufacture. It is available in various colours, generally bronze, grey, blue and green.