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Code of Practice
• UK standard: BS 8206-2 • Energy implications: BS EN 15193• Work on a European Standard
Daylight Factor
• 2% Room appears day lit• 5% Electric light not needed during
day
• 1% Bedrooms• 1.5% Living rooms• 2% Kitchens
Sunlight
Where there is a reasonable expectation of sunlight:• 25% of probable sunlight hours• 5% during the winter
BS EN 15193
Energy saving depends on:• Daylight availability - location• Daylight penetration - DF• Lighting System - controls
European Standard
• General rules for buildings
Annexes• View• Daylight available at site• Daylight performance of the building• Health impact