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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 up to 30 with a big effective location of solar radiation. A north-facing window, in summer, has a high angle of incidence and a low effective area of solar radiation, so can transfer less heat than a west-facing one.

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You can rapidly and quickly enhance the thermal performance of your house 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 really 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.

The energy performance of IGUs likewise 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. Broader cavities offer lower (better) U values, with 12mm typically accepted as the preferred gap how well the cavity is sealed.

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

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In fact, IGUs can deliver better energy efficiency for all climates, specifically in heated and air-conditioned houses. Cross-section information of single, double and triple-glazing units Low emissivity glass (typically called low-e glass) decreases heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a coating that allows daytime from the sun to enter the house to achieve excellent solar heat gain, but lowers the quantity 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 film metal finishing. Pyrolytic finishes are resilient and can be utilized for any glazing; vacuum-deposited coatings are soft and are just used within IGUs. Low-e coverings can substantially enhance both U worth and SHGC; however, they must be utilized correctly or they will either deteriorate or fail to carry out as required.

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Low-e coatings can be used in combination with clear, toned or reflective glass. Low-e coatings on glazing can reduce heat transfer where needed Image: Department of Industry, Science, Energy and Resources Toned glass has colouring ingredients included during manufacture. It is available in different colours, normally bronze, grey, blue and green.