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

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You can quickly and quickly improve 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 extremely efficient 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.

The energy performance of IGUs also depends on: the properties of each layer of glass. Various 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 (much better) U values, with 12mm generally accepted as the preferred gap how well the cavity is sealed.

If argon is set up to the cavity in place of air, moisture is reliably left out the level of desiccant (drying agent). The spacer (metal or polymer strip) that separates the glass layers consists of a desiccant to soak up any wetness. Inadequate desiccant might trigger moisture to condense on the glass surface in cold conditions, minimizing thermal performance.

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IGUs can deliver better energy performance for all environments, especially in heated and air-conditioned homes. Cross-section detail of single, double and triple-glazing systems Low emissivity glass (commonly called low-e glass) lowers heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a finishing that allows daytime from the sun to pass into your house to attain great solar heat gain, however 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 movie metal finishing. Pyrolytic coverings are resilient and can be used for any glazing; vacuum-deposited coatings are soft and are only utilized within IGUs. Low-e coverings can significantly enhance both U value and SHGC; nevertheless, they must be utilized properly or they will either degrade or fail to carry out as needed.

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Low-e coverings can be used in mix with clear, toned or reflective glass. Low-e finishes on glazing can reduce heat transfer where required Image: Department of Industry, Science, Energy and Resources Toned glass has actually colouring additives included during manufacture. It is offered in different colours, normally bronze, grey, blue and green.