scope:

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 eooms and permit comparison between different types of glazing. This standard applies both to conventional glazing and the absorbing or reflecting solarcontrol glazing, used as vertical or horizontal glazed apertures. The appropriate formulae for single, double and triple glazing are given. This standard is accordingly applicable to all transparent materials except those which show significant transmission in the wavelength region (5 to 50) µm of ambient temterature 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.