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

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You can quickly and quickly enhance the thermal performance of your home by replacing 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 very effective when it comes to heat loss or gain. To enhance efficiency, you can use single glazing with a more energy-efficient type of glass such as low emissivity (low-e) glass.

Several layers can be assembled with sealed cavities in between each sheet of glass. IGUs generally provide better energy efficiency than single glazing, since they transfer less energy. However, the energy efficiency of IGUs likewise depends on: the properties of each layer of glass. Different glass types (for instance, 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 (better) U worths, with 12mm usually accepted as the preferred space how well the cavity is sealed.

If argon is set up to the cavity in place of air, wetness is reliably omitted 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 wetness. Inadequate desiccant may trigger wetness to condense on the glass surface in cold conditions, decreasing thermal efficiency.

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In fact, IGUs can deliver better energy performance for all environments, particularly in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing systems Low emissivity glass (frequently called 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 enables daytime from the sun to pass into your house to accomplish great solar heat gain, but decreases the amount of the long wavelength infrared heat that can leave back through the window.

Low-e glass has either a pyrolytic coating or a vacuum-deposited thin film metal coating. Pyrolytic coverings are durable and can be utilized for any glazing; vacuum-deposited coverings are soft and are only utilized within IGUs. Low-e coatings can significantly improve both U value and SHGC; however, they need to be used properly or they will either weaken or fail to carry out as required.

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Low-e finishings can be used in mix with clear, toned or reflective glass. Low-e coatings on glazing can minimize heat transfer where required Picture: Department of Industry, Science, Energy and Resources Toned glass has colouring ingredients consisted of during manufacture. It is available in various colours, normally bronze, grey, blue and green.