Blinds and shutters - Thermal and visual comfort - Performance characteristics and classification

NEN-EN 14501 applies to the whole range of shutters, awnings and blinds defined in EN 12216, described as solar protection devices in this document.It specifies the corresponding properties and classifications:- relating to thermal comfort:- the solar factor (total solar energy transmittance);- the secondary heat transfer factor;- the direct solar transmittance;- relating to visual comfort:- the darkening performance;- the night privacy;- the visual contact with the outside;- the glare control;- the daylight utilization;- the rendering of colours.