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That window can send 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 large efficient location of solar radiation. A north-facing window, in summer, has a high angle of incidence and a low efficient location of solar radiation, so can send less heat than a west-facing one.
You can rapidly and easily enhance the thermal performance of your home by changing your windows. There are thousands of types of glass and frames to pick from.
Single glazing with clear glass is not really efficient when it comes to heat loss or gain. To improve efficiency, you can use single glazing with a more energy-efficient type of glass such as low emissivity (low-e) glass.
The energy performance 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.
IGU cavities can be filled with air or a more inert, low-conductivity gas such as argon the width of the cavity. Wider cavities provide lower (better) U values, with 12mm usually accepted as the preferred gap how well the cavity is sealed.
If argon is set up to the cavity in location of air, wetness is dependably left out the level of desiccant (drying agent). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to absorb any moisture. Inadequate desiccant may cause wetness to condense on the glass surface area in cold conditions, reducing thermal efficiency.
In reality, IGUs can deliver better energy performance for all climates, particularly in heated and air-conditioned houses. Cross-section detail of single, double and triple-glazing systems Low emissivity glass (frequently called low-e glass) minimizes heat transfer. Low-e glass might be either high or low transmission: High transmission low-e glass has a finishing that allows daylight from the sun to pass into the house to achieve great solar heat gain, but decreases the amount of the long wavelength infrared heat that can leave back through the window.
Low-e glass has either a pyrolytic coating or a vacuum-deposited thin movie metal finish. Pyrolytic finishings are durable and can be utilized for any glazing; vacuum-deposited coatings are soft and are only used within IGUs. Low-e coverings can significantly improve both U value and SHGC; however, they must be utilized correctly or they will either degrade or stop working to carry out as needed.
Low-e finishings can be used in combination with clear, toned or reflective glass. Low-e finishes on glazing can decrease heat transfer where required Photo: Department of Industry, Science, Energy and Resources Toned glass has colouring ingredients included during manufacture. It is available in various colours, normally bronze, grey, blue and green.
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