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That window can transfer more solar heat in winter season than in summer season. A west-facing window on a summer's afternoon has an angle of occurrence from near 0 as much as 30 with a big effective location 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 quickly and easily 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 very effective 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.

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 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. Larger cavities supply lower (better) U values, with 12mm normally accepted as the favored space how well the cavity is sealed.

If argon is set up to the cavity in location of air, moisture is reliably left out the level of desiccant (drying agent). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to soak up any moisture. Insufficient desiccant may trigger moisture to condense on the glass surface area in cold conditions, decreasing thermal efficiency.

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In truth, IGUs can provide better energy performance for all environments, particularly in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing units Low emissivity glass (commonly known as 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 daylight from the sun to pass into your house to attain good solar heat gain, but minimizes the quantity of the long wavelength infrared heat that can escape back through the window.

Low-e glass has either a pyrolytic finishing or a vacuum-deposited thin film metal finishing. Pyrolytic coatings are long lasting and can be used for any glazing; vacuum-deposited coverings are soft and are only used within IGUs. Low-e coatings can significantly enhance both U worth and SHGC; however, they must be used properly or they will either degrade or fail to perform as needed.

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Low-e coverings can be used in combination with clear, toned or reflective glass. Low-e finishes on glazing can reduce heat transfer where needed Photo: Department of Market, Science, Energy and Resources Toned glass has colouring ingredients consisted of throughout manufacture. It is available in various colours, normally bronze, grey, blue and green.