Glossary
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Double GlazingGlazing whose U-value is reduced from the level of standard single glazing by the installation of two panes. ‘Evacuated’ double glazing is factory-constructed hermetically sealed with a near vacuum between the panes; if air is allowed between the panes, condensation may occur, so glazing should be constructed to allow access to the air space. (In higher latitudes of the Northern Hemisphere, triple glazing is common). | |
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