Original

Renovation

Main Window Size

Horizontal window:

(1000 mm × 1100 mm) × 3

Horizontal Window:

2500 mm × 8000 mm Skylight:

3200 mm × 15000 mm

Window to Wall Ratio

1:30

1:3

Mean Daylight Factor

1.29

6.18

Meet the criteria of CIBSE

NO

YES

Minimum Daylight Factor (%)

0.4

4.4

Meet the criteria of CIBSE

NO

YES

Uniformity Ratio

0.46

0.71

Meet the requirement of CIBSE

NO

YES

Occupied time of 300 lux-Daylight

Autonomy (%)

48.08

90.05

DGP

Low

Relatively Higher