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Description of 24/30498651 DC 2024This document specifies methods of determining the luminous and solar characteristics of glazing in buildings. These characteristics can serve as a basis for lighting, heating and cooling calculations of rooms and permit comparison between different types of glazing. This document applies both to conventional glazing and to absorbing or reflecting solar-control glazing, used as vertical or horizontal glazed apertures. The appropriate formulae for single, double and triple glazing are given. A matrix method is provided as an alternative calculation method. This document introduces a method to determine the luminous and solar properties of Building-Integrated Photovoltaic (BIPV) glazing. This document is accordingly applicable to all transparent materials except those which show significant transmission in the wavelength region 5 µm to 50 µm of ambient temperature radiation, such as certain plastic materials. Materials with light-scattering properties for incident radiation are dealt with as conventional transparent materials subject to certain conditions (see 5.2). Angular light and solar properties of glass in building are excluded from this document. However, research work in this area is summarized in Bibliographic references [1], [2] and [3]. Guidance on the measurement of luminous and spectral properties of glass can be found in the Bibliography [4]. Vacuum Insulating Glass (VIG) is excluded from the scope of this document. For determination of the g value of VIG, please refer to ISO 19916-1.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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