Daylight Legislation- Peter Raynham

Daylight Code of Practice?

Daylight: provides light for tasks

Daylight: attractive environment

Daylight: can go wrong

Code of Practice

• UK standard: BS 8206-2 • Energy implications: BS EN 15193• Work on a European Standard

BS8206-2

Recommendations• Daylight factor• Sunlight• View

Daylight Factor

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

View

BS EN 15193

Energy saving depends on:• Daylight availability - location• Daylight penetration - DF• Lighting System - controls

BS EN 15193

Operation – 8:00 – 19:00

European Standard

• New project• No drafted text yet• Plan of document only

European Standard

• General rules for buildings

Annexes• View• Daylight available at site• Daylight performance of the building• Health impact

Conclusion