Impact of lighting controls 7800
Annual Energy Use (Source)
No lighting controls
Expected shape of energy performance in a high performance building Op8mum window to wall ra8o (WWR) depends on many factors: • Climate zone • Orienta8on • Glass VT, SHGC, u-‐factor • Depth of daylight zone • Interior design • Dimming control details
With continuously dimming lighting controls 7600
7400
7200
7000
6800
6600
0
10 20 wall 30 Window to ratio
WWR, %
40
50
Most energy efficient design