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That window can transmit more solar heat in winter than in summertime. A west-facing window on a summer's afternoon has an angle of occurrence from near 0 approximately 30 with a large reliable location of solar radiation. A north-facing window, in summer, has a high angle of occurrence 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 enhance the thermal performance of your home by changing 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 extremely effective when it comes to heat loss or gain. To improve efficiency, 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 likewise 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.

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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 thickness is typically 6 to 18mm. Wider cavities provide lower (much better) U values, with 12mm normally accepted as the preferred gap how well the cavity is sealed. Cavities need to be dry and well sealed to prevent moisture getting in.

If argon is installed to the cavity in place of air, wetness is reliably excluded the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to soak up any wetness. Insufficient desiccant may trigger wetness to condense on the glass surface area in cold conditions, lowering thermal performance.

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IGUs can provide 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 (frequently called low-e glass) decreases heat transfer. Low-e glass might be either high or low transmission: High transmission low-e glass has a finish that allows daytime from the sun to enter the home to achieve good solar heat gain, however decreases the amount of the long wavelength infrared heat that can escape back through the window.

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

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Low-e coverings can be utilized in mix with clear, toned or reflective glass. Low-e finishes on glazing can decrease heat transfer where required Picture: Department of Market, Science, Energy and Resources Toned glass has actually colouring ingredients consisted of during manufacture. It is available in numerous colours, usually bronze, grey, blue and green.