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That window can transfer more solar heat in winter season than in summer. A west-facing window on a summer's afternoon has an angle of incidence from near 0 as much as 30 with a big 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 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 replacing your windows. There are thousands of types of glass and frames to select from.

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Single glazing with clear glass is not extremely effective when it comes to heat loss or gain. To enhance performance, 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 also depends on: the residential or commercial 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. Broader cavities offer lower (better) U values, with 12mm normally accepted as the favored space how well the cavity is sealed.

If argon is set up to the cavity in location of air, moisture is dependably left out the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers consists of a desiccant to soak up any wetness. Inadequate desiccant might cause wetness to condense on the glass surface in cold conditions, minimizing thermal efficiency.

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IGUs can deliver much better energy efficiency for all climates, especially in heated and air-conditioned homes. Cross-section detail of single, double and triple-glazing systems Low emissivity glass (frequently referred to as low-e glass) decreases heat transfer. Low-e glass may be either high or low transmission: High transmission low-e glass has a covering that permits daytime from the sun to enter your home to achieve great solar heat gain, however minimizes 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 film metal finish. Pyrolytic coatings are durable and can be used for any glazing; vacuum-deposited finishings are soft and are only used within IGUs. Low-e coatings can substantially enhance both U value and SHGC; nevertheless, they need to be used correctly or they will either weaken or stop working to perform as required.

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