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That window can send more solar heat in winter season than in summer season. A west-facing window on a summertime's afternoon has an angle of incidence from near 0 as much as 30 with a large effective location of solar radiation. A north-facing window, in summer season, has a high angle of occurrence and a low effective location of solar radiation, so can transfer less heat than a west-facing one.

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You can rapidly and easily 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 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 put together with sealed cavities between each sheet of glass. IGUs generally offer much better energy performance than single glazing, because they send less energy. However, the energy efficiency of IGUs likewise depends upon: the residential or commercial properties of each layer of glass. Various glass types (for example, 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. Larger cavities provide lower (better) U values, with 12mm typically accepted as the favored 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 left out the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers contains a desiccant to soak up any wetness. Inadequate desiccant might trigger wetness to condense on the glass surface in cold conditions, lowering thermal performance.

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IGUs can deliver better energy performance for all environments, particularly in heated and air-conditioned houses. Cross-section detail of single, double and triple-glazing systems Low emissivity glass (frequently understood as 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 enables daylight from the sun to pass into the house to attain great 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 finish or a vacuum-deposited thin movie metal covering. Pyrolytic finishings are long lasting and can be used for any glazing; vacuum-deposited coverings are soft and are just used within IGUs. Low-e coatings can considerably enhance both U value and SHGC; however, they must be utilized properly or they will either deteriorate or fail to perform as needed.

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Low-e coverings can be used in mix with clear, toned or reflective glass. Low-e coverings on glazing can decrease heat transfer where needed Picture: Department of Industry, Science, Energy and Resources Toned glass has actually colouring additives consisted of during manufacture. It is readily available in different colours, usually bronze, grey, blue and green.