How Are Double Glazed Windows More Energy Efficient? in Mt Helena WA thumbnail

How Are Double Glazed Windows More Energy Efficient? in Mt Helena WA

Published Nov 16, 23
3 min read

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



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You can quickly and easily improve 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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There are several types of glass products to select from. Single glazing uses a single pane of glass. Single glazing with clear glass is not really effective when it concerns 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.

Several layers can be assembled with sealed cavities between each sheet of glass. IGUs generally offer better energy performance than single glazing, because they transfer less energy. However, the energy efficiency of IGUs also depends upon: the properties of each layer of glass. Different 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. Larger cavities offer lower (better) U values, with 12mm typically accepted as the favored space how well the cavity is sealed.

If argon is set up to the cavity in place of air, wetness is dependably omitted the level of desiccant (drying representative). The spacer (metal or polymer strip) that separates the glass layers includes a desiccant to take in any wetness. Insufficient desiccant may cause wetness to condense on the glass surface area in cold conditions, lowering thermal efficiency.

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In reality, IGUs can provide better energy efficiency for all climates, especially 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 covering that permits daylight from the sun to pass into your house to achieve great solar heat gain, but lowers the amount of the long wavelength infrared heat that can get away back through the window.

Low-e glass has either a pyrolytic finish or a vacuum-deposited thin movie metal coating. Pyrolytic finishes are durable and can be used for any glazing; vacuum-deposited finishes are soft and are just used within IGUs. Low-e coverings can considerably improve both U value and SHGC; however, they need to be utilized properly or they will either degrade or stop working to perform as required.

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Low-e coatings can be used in mix with clear, toned or reflective glass. Low-e finishes on glazing can minimize heat transfer where needed Photo: Department of Market, Science, Energy and Resources Toned glass has actually colouring ingredients included throughout manufacture. It is offered in various colours, normally bronze, grey, blue and green.