This presentation provides a high level summary of the Daylighting Analysis including Glare Evaluation and climate based metrics (Daylight Autonomy -DA - and Utilization of Daylight Index - UDI) of Electrochromic switchable glazing compared to conventional static glazing for the atrium roof in a ten story Office Building.in South Korea. These analysis were performed using a detailed model constructed in Rhino and using Diva, a plugin for Rhino developed by Christoff Reinhart, Alstan Jekubiac and Jeffrey Neimasz at the Harvard School of Architecture. The annual daylighting performance utilyzes the unique dynamic shading modeling capability in DIVA which works in conjunction with Radiance, a program developed by the Biulding Technology Group at LBNL and by Greg Ward. DIVA is marketed by Solemma (see www.diva4rhino.com). Electrochromic glazing modeled as per the manufacturer's specifications - Sage Electrochroimics, Inc.

1. Presentation to Sage Electrochromics March 22, 2013
Effectiveness of Electrochromic Glazing
on an Office Building in Seoul South Korea
1. Architect Renderings
2. Rhinocerous 3D Model
3. Radiance Visualization/Glare Studies
4. Modeling EC Glazing as Dynamic Shading with DIVA 2.0
5. Visualization images showing that Dynamic Shading controls glare in atrium
6. Daysim Daylight Autonomy and Utilization of Daylight Illuminance Studies
7. Conclusions
Contents

2. Report for Sage Electrochromics Mar 22, 2013
Seoul South Korea Office Building

3. Report for Sage Electrochromics Mar 22, 2013
Seoul South Korea Office Building

4. Report for Sage Electrochromics Mar 22, 2013
Seoul South Korea
Office Building

5. Report for Sage Electrochromics Mar 22, 2013
Rhino Model
for Diva Simulations
with Radiance and Daysim

6. Report for Sage Electrochromics Mar 22, 2013
Baseline Daylight Glare Probability (dgp)

7. Report for Sage Electrochromics Mar 22, 2013
Baseline Daylight Glare Probability (dgp)
Perceptible Glare
Intolerable Glare

8. Report for Sage Electrochromics Mar 22, 2013
Baseline Glare Study Views
To Be Added

9. Report for Sage Electrochromics Mar 22, 2013
5thFloor Atrium Glare with Standard Glazing
June 21 12:00 pm
5th Floor View into Atrium Clear sky
Sep 21 12:00 pm Dec 21 12:00 pm

10. Report for Sage Electrochromics Mar 22, 2013
5thFloor Atrium Office
Fisheye view of 5th Floor Meeting Room - Clear Sky Sept 21 12:00 pm
10,000 lux

11. Report for Sage Electrochromics Mar 22, 2013
Rhino Model
for Diva Simulations
with Radiance and Daysim
Advanced Dynamic Shading Results

12. Report for Sage Electrochromics Mar 22, 2013
DynamicShadingAnalyses

13. Report for Sage Electrochromics Mar 22, 2013
5thFloor Atrium Glare controlled by EC Dynamic Shading
View toward Atrium Clear sky Sept 21 12:00 pm
View into Atrium from meeting room

14. Report for Sage Electrochromics Mar 22, 2013
5thFloor Atrium Glare with EC dynamic shading
View into Atrium Clear sky Sept 21 12:00 pm
View into Atrium from meeting room

15. Report for Sage Electrochromics Mar 22, 2013
DAYSIM Climate Based Daylighting Metrics
Daylight Autonomy and
Usefull Daylight Illuminance
Daylight Autonomy
Daylight Autonomy (DA) is the percentage
of annual occupied hours (assumed to be
8am-6pm) that a given point in a space is
above a specified illumination level. For the
graphs shown, a Daylight Autonomy
threshold of 300 lux (DA300) was selected.
The mean percent values represent the
percentage of the floor area that exceeds
300 lux for at least 50% of the time.
Useful Daylight Illuminance
Useful Daylight Illuminance (UDI) is a modification of Daylight Autonomy conceived by
Mardaljevic and Nabil in 2005. This metric “bins” hourly time values based upon three
illumination ranges, 0-100 lux, 100-2000 lux, and over 2000 lux. It provides full credit
only to values between 100 lux and 2,000 lux based on the premise that horizontal
illumination values outside of this range are not useful.

16. Report for Sage Electrochromics Mar 22, 2013
5th Floor and 8th Floor
Daylight Autonomy >300 lux
Dynamic Shading studies show no appreciable
loss in daylighting opportunity
8th Floor
Baseline Daylight Autonomy

17. Report for Sage Electrochromics Mar 22, 2013
5th Floor DA
Mean Daylight Autonomy >300 lux on workplane
Low-E vs. SAGE Electrochromic Atrium Glazing
No significant loss in daylighting opportunity
Low-e Glass with no dynamic shading
Mean Daylight Autonomy = 38% of time occupied
EC Switchable Glass dynamic shading
Mean Daylight Autonomy = 37% of time occupied
5th Floor Daylight Autonomy

18. Report for Sage Electrochromics Mar 22, 2013
5th Floor UDI
Mean Useful Daylight Illumination
100-2000 lux
Low-E vs. SAGE Electrochromic Atrium Glazing
EC Glass significantly improves useful daylight illumination
5th Floor Useful Daylight Illumination
Low-e Glass with no dynamic shading
Mean Utilization of Daylight Illumination
= 57.5% of time occupied
EC Switchable Glass dynamic shading
Mean Utilization of Daylight Illumination
= 65% of time occupied

19. Report for Sage Electrochromics Mar 22, 2013
5th Floor UDI Mean Useful Daylight Illumination <100 and >2000 lux
5th Floor Utilization of Daylight Illumination (unusable)
Low-e Glass with no dynamic shading EC Switchable Glass dynamic shading
UDI <100 Lux (inadequate illumination)
UDI >2000 Lux (Excessive illumination)
EC results in
Less Glare

20. Report for Sage Electrochromics Mar 22, 2013
8th Floor
Dynamic
Shading
Analysis

21. Report for Sage Electrochromics Mar 22, 2013
8th Floor Daylight Autonomy
Mean Daylight Autonomy >300 lux on workplane
Low-E vs. SAGE Electrochromic Atrium Glazing
No significant loss in daylighting opportunity
8th Floor Daylight Autonomy
Low-e Glass with no dynamic shading
Mean Daylight Autonomy = 48% of time occupied
EC Switchable Glass dynamic shading
Mean Daylight Autonomy = 45% of time occupied

22. Report for Sage Electrochromics Mar 22, 2013
8th Floor UDI
Mean Useful Daylight Illumination
100-2000 lux
Low-E vs. SAGE Electrochromic Atrium Glazing
EC Glass significantly improves useful daylight illumination
8th Floor Utilization of Daylight Illumination
Low-e Glass with no dynamic shading
Mean Utilization of Daylight Illumination
= 49% of time occupied
EC Switchable Glass dynamic shading
Mean Utilization of Daylight Illumination
= 54% of time occupied

23. Report for Sage Electrochromics Mar 22, 2013
8th Floor Utilization of Daylight Illumination (unusable)
Low-e Glass with no dynamic shading EC Switchable Glass dynamic shading
UDI <100 Lux (inadequate illumination)
UDI >2000 Lux (Excessive illumination)
8th Floor UDI Mean Useful Daylight Illumination <100 and >2000 lux
EC results in
Less Glare

24. Report for Sage Electrochromics Mar 22, 2013
1st Floor
Dynamic
Shading
Analysis

25. Report for Sage Electrochromics Mar 22, 2013
1st Floor Daylight Autonomy
Mean Daylight Autonomy >300 lux on workplane
Low-E vs. SAGE Electrochromic Atrium Glazing
2-4% loss in daylight autonomy
1st Floor Daylight Autonomy
Low-e Glass with no dynamic shading
Mean Daylight Autonomy - % of time occupied
1st floor except Atrium = 50% Atrium = 94%
EC Switchable Glass dynamic shading
Mean Daylight Autonomy
1st floor except Atrium = 48% Atrium = 90%

26. Report for Sage Electrochromics Mar 22, 2013
1st Floor UDI
Mean Useful Daylight Illumination
100-2000 lux
Low-E vs. SAGE Electrochromic Atrium Glazing
EC Glass significantly improves atrium UDI
1st Floor Utilization of Daylight Illumination
Low-e Glass with no dynamic shading
Mean Utilization of Daylight Illumination
1st floor except Atrium = 61.7% Atrium = 59%
EC Switchable Glass dynamic shading
Mean Utilization of Daylight Illumination
1st floor except Atrium = 61% Atrium = 88%

27. Report for Sage Electrochromics Mar 22, 2013
1st Floor Utilization of Daylight Illumination (unusable)
Low-e Glass with no dynamic shading EC Switchable Glass dynamic shading
UDI <100 Lux (inadequate illumination)
UDI >2000 Lux (Excessive illumination)
1st Floor UDI Mean Useful Daylight Illumination <100 and >2000 lux
EC results in
27% Less Glare

28. Report for Sage Electrochromics Mar 22, 2013
8th Floor Atrium View Glare
Daylight Glare Probability (dgp) for EC Glazing States
EC Clear (60% VT) EC20 (20% VT) EC06 (6% VT) EC02(2% VT)

29. Report for Sage Electrochromics Mar 22, 2013
Perceptible Glare
Intolerable Glare
Ground Floor Atrium View Glare
Daylight Glare Probability (dgp) for EC Glazing States
EC Clear (60% VT) EC20 (20% VT) EC06 (6% VT) EC02(2% VT)

30. Presentation to Sage Electrochromics Mar 22, 2013
EC Glazing Dynamic Shading States and Illuminance
Loren Abraham, AIA, LEED AP, IDSA, Abraham & Associates
Source: Modeling Dynamic Shading Devices with the DIVA Advanced Shading Module by J. Alstan Jakubiec, Solemma LLC, MIT Building Technology and Jeff Neimasz, Solemma, LLC

31. Presentation to Sage Electrochromics Mar 22, 2013
Conclusions
1. Electrocrhomic Glazing modeled as a dynamic shading can effectively
reduce disability glare caused by direct illumination through the atrium
when compared to static glazing such as Dual Pane Low-e glass.
2. Mean Useful Daylight Illumination is improved overall when
Electrochromic glazing is used for atrium glazing.
3. Mean Daylight autonomy where >300 Lux is maintained on the
workplane is slightly reduced when Electrochromic Glazing is used for
atrium glazing in lieu of Low-e glazing
 5th Floor Mean DA >300 Lux is reduced from 38% to 37% of occupied
hours
 8th Floor Mean DA >300 Lux is reduced from 48% to 45% of occupied
hours
 1st Floor Mean DA >300 Lux is reduced from 50% to 48% of occupied
hours except in Atrium where it is reduced from 94% to 90%
Loren Abraham, AIA, LEED AP, IDSA, Abraham & Associates