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That window can transmit more solar heat in winter than in summer. A west-facing window on a summer's afternoon has an angle of incidence from near 0 up to 30 with a large effective location of solar radiation. A north-facing window, in summer, has a high angle of incidence and a low efficient area of solar radiation, so can transfer less heat than a west-facing one.
You can rapidly and quickly improve the thermal efficiency of your home by replacing your windows. There are thousands of types of glass and frames to choose from.
Single glazing with clear glass is not very 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 efficiency of IGUs also depends on: the properties of each layer of glass. Different glass types (for example, clear and low-e glass) can be put together in an IGU.
IGU cavities can be filled with air or a more inert, low-conductivity gas such as argon the width of the cavity. Broader cavities supply lower (better) U values, with 12mm typically accepted as the preferred space how well the cavity is sealed.
If argon is installed to the cavity in place of air, wetness is reliably omitted the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to soak up any moisture. Inadequate desiccant might trigger wetness to condense on the glass surface in cold conditions, minimizing thermal efficiency.
IGUs can deliver much better energy efficiency for all environments, specifically in heated and air-conditioned homes. Cross-section information of single, double and triple-glazing systems Low emissivity glass (frequently called low-e glass) lowers heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a finish that allows daytime from the sun to pass into the home to attain great solar heat gain, however reduces the quantity of the long wavelength infrared heat that can leave back through the window.
Low-e glass has either a pyrolytic covering or a vacuum-deposited thin film metal coating. Pyrolytic coverings are long lasting and can be used for any glazing; vacuum-deposited finishes are soft and are only used within IGUs. Low-e coverings can substantially improve both U worth and SHGC; however, they need to be used correctly or they will either deteriorate or fail to carry out as needed.
Low-e coatings can be used in combination with clear, toned or reflective glass. Low-e coverings on glazing can lower heat transfer where required Picture: Department of Industry, Science, Energy and Resources Toned glass has actually colouring additives consisted of during manufacture. It is available in various colours, typically bronze, grey, blue and green.
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