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Energy efficient window

Did you know that much of the heat in your house is wasted? In an average home, one quarter of the heat is lost through the walls, and as much as 40% through the windows.

SIJH ’s range of double glazing is an assembly featuring two sheets of glass separated by a space filled with dry air. This design keeps heat in your home, allowing you to turn the heating down and save money.

Low-emissivity (low-e) glass has been around for several years now. Its secret is the virtually invisible coating applied to one of the two sheets of glass. This coating lets the sun’s rays through (translating into free heat) while reflecting heat in the room back inside so that it does not escape – forming a shield against the cold. As a result, low-e glass provides twice as much insulation as ordinary double glazing. This allows you to install larger windows without having to worry about the impact on your fuel bill - plus you'll feel comfortable everywhere in the room, even right next to the windows.

Low-e glass: The lower the Ug-value the higher the level of insulation

Low-e glass: The lower the U-value the higher the level of insulation

Heat comes in… but doesn't go out
 

Heat comes in… but doesn't go outThe coating on low-e glass is transparent to sunshine, which consists of ultraviolet radiation, visible light and short infrared radiation. In other words, it lets free solar heat into your home. This heat is then absorbed by walls and objects in the room, which in turn heat up and release the heat in every direction like a radiator. But since this type of radiation differs from solar radiation (in that it consists solely of long infrared radiation), it cannot pass through the coating. It is reflected back into the room, significantly cutting the amount of heat lost through the glass.

 

 

 
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In an average home, one quarter of the heat is lost through the walls, and as much as 40% through the windows.
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