Daylight Factor کا حساب کیسے لگائیں
Daylight Factor کیا ہے؟
Daylight factor measures indoor daylight availability as percentage of outdoor illuminance. It determines whether artificial lighting is required.
فارمولا
Daylight factor = (indoor illumination / outdoor illumination) × 100%
مرحلہ وار گائیڈ
- 1Daylight factor = (indoor illumination / outdoor illumination) × 100%
- 2Values: <2% (supplementary lighting needed), 2-5% (adequate), >5% (well-lit)
- 3Depends on window size, orientation, obstruction
حل شدہ مثالیں
ان پٹ
Indoor illumination 100 lux, outdoor 5000 lux
نتیجہ
Daylight factor = 2% (borderline, likely needs supplementary lighting)
Typical office
عام غلطیاں جن سے بچنا ہے
- ✕Over-sizing windows in climate with high cooling loads
- ✕Neglecting glare control in high daylight factor spaces
اکثر پوچھے جانے والے سوالات
Does orientation affect daylight factor?
Significantly; south-facing windows get stable light, north-facing less direct but more diffuse.
How do you improve daylight factor?
Increase window area, use reflective interior surfaces, reduce obstructions, add skylights.
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