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

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You can quickly and easily enhance the thermal performance of your home by replacing your windows. There are thousands of types of glass and frames to pick 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.

Multiple layers can be put together with sealed cavities between each sheet of glass. IGUs usually use much better energy performance than single glazing, since they transfer less energy. The energy efficiency of IGUs likewise depends on: the homes of each layer of glass. Different glass types (for instance, clear and low-e glass) can be created 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 worths, with 12mm generally accepted as the favored gap how well the cavity is sealed.

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

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In fact, IGUs can provide better energy efficiency for all climates, especially in heated and air-conditioned houses. Cross-section detail of single, double and triple-glazing systems Low emissivity glass (typically referred to as low-e glass) minimizes heat transfer. Low-e glass might be either high or low transmission: High transmission low-e glass has a finishing that allows daylight from the sun to pass into the house to attain good 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 coating or a vacuum-deposited thin movie metal finishing. Pyrolytic finishes are resilient and can be used for any glazing; vacuum-deposited finishings are soft and are only used within IGUs. Low-e finishings can significantly enhance both U worth and SHGC; however, they need to be used correctly or they will either weaken or stop working to perform as required.

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Low-e coatings can be used in mix with clear, toned or reflective glass. Low-e coverings on glazing can lower heat transfer where required Photo: Department of Market, Science, Energy and Resources Toned glass has colouring additives consisted of during manufacture. It is offered in different colours, usually bronze, grey, blue and green.