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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 incidence from near 0 as much as 30 with a big efficient location of solar radiation. A north-facing window, in summer season, has a high angle of incidence and a low reliable area of solar radiation, so can send less heat than a west-facing one.

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You can rapidly and quickly improve 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 very effective when it comes to heat loss or gain. To improve performance, you can utilize 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. Different 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 provide lower (better) U worths, with 12mm usually accepted as the preferred space how well the cavity is sealed.

If argon is installed to the cavity in place of air, wetness is dependably excluded the level of desiccant (drying agent). The spacer (metal or polymer strip) that separates the glass layers consists of a desiccant to take in any wetness. Insufficient desiccant might cause wetness to condense on the glass surface in cold conditions, minimizing thermal performance.

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In fact, IGUs can deliver much better energy performance for all environments, especially in heated and air-conditioned houses. Cross-section detail of single, double and triple-glazing units Low emissivity glass (frequently referred to as low-e glass) minimizes heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a coating that enables daylight from the sun to enter the home to attain great solar heat gain, but minimizes 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 film metal coating. Pyrolytic finishings are resilient and can be utilized for any glazing; vacuum-deposited coatings are soft and are just used within IGUs. Low-e finishes can substantially improve both U value and SHGC; however, they should be utilized correctly or they will either weaken or stop working to perform as required.

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