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That window can transfer more solar heat in winter season than in summertime. A west-facing window on a summer season's afternoon has an angle of incidence from near 0 up to 30 with a big efficient area of solar radiation. A north-facing window, in summertime, has a high angle of incidence 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 easily enhance the thermal efficiency 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 really effective when it comes to heat loss or gain. To enhance performance, you can utilize single glazing with a more energy-efficient type of glass such as low emissivity (low-e) glass.

Multiple layers can be assembled with sealed cavities in between each sheet of glass. IGUs normally offer much better energy efficiency than single glazing, since they transfer less energy. The energy efficiency of IGUs likewise depends on: the residential or commercial properties 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. Cavity density is generally 6 to 18mm. Broader cavities offer lower (much better) U worths, with 12mm normally accepted as the favored space how well the cavity is sealed. Cavities must be dry and well sealed to avoid wetness getting in.

If argon is set up to the cavity in location of air, wetness is reliably excluded the level of desiccant (drying agent). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to soak up any wetness. Inadequate desiccant might cause wetness to condense on the glass surface in cold conditions, lowering thermal efficiency.

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IGUs can deliver much better energy efficiency for all environments, especially in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing units Low emissivity glass (typically 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 enables daylight from the sun to enter your home to attain good solar heat gain, but decreases the amount of the long wavelength infrared heat that can escape back through the window.

Low-e glass has either a pyrolytic finish or a vacuum-deposited thin movie metal coating. Pyrolytic coverings are long lasting and can be utilized for any glazing; vacuum-deposited finishes are soft and are only utilized within IGUs. Low-e finishes can significantly enhance both U value and SHGC; however, they must be utilized properly or they will either weaken or fail to carry out as needed.

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Low-e finishings can be used in combination with clear, toned or reflective glass. Low-e finishings on glazing can lower heat transfer where required Image: Department of Industry, Science, Energy and Resources Toned glass has actually colouring ingredients included during manufacture. It is readily available in various colours, generally bronze, grey, blue and green.