This workshop will provide a general overview of daylighting strategies in commercial buildings, emphasizing the importance of integrating daylighting with energy-efficient lighting systems and controls. We will also explore how daylighting is achieved from a LEED standpoint and how CA's Title 24 addresses daylighting. Sandy Houck, LC, LEED AP of Brummitt Energy Associates will present the benefits of daylighting strategies for your commercial project.

1. OPTIMIZING DAYLIGHTING
STRATEGIES
PRESENTED BY:
Sandy Houck, LEED AP, LC
August 18, 2011
Improving the performance and value of your buildings

2. GOALS
 MAKE DAYLIGHTING A PRIORITY IN DESIGN
 START EARLY IN THE DESIGN PROCESS
 PROVIDE AUTOMATIC DAYLIGHTING CONTROLS
 PROVIDE COMMISSIONING & EDUCATE OCCUPANTS

3. DAYLIGHTING FOR
TASK-ORIENTED SPACES
PHOTO CREDIT: SQUARE1
SUNLIT SPACE DAYLIT SPACE

4. WHAT WE DON’T WANT TO CREATE…
A SAUNA WHERE PEOPLE HAVE TO WORK
PHOTO CREDIT: DAYLIGHTING COLLABORATIVE

5. WHAT WE DON’T WANT TO CREATE…
A DOUBLE-LIT SPACE
IT’S NOT EFFECTIVE
DAYLIGHT UNLESS THE
ELECTRIC LIGHTS
ARE OFF.

6. DAYLIGHT AVAILABILITY
 DIRECT SUN
 DIFFUSE SKY LIGHT
 REFLECTED LIGHT
SOURCE: ILLUMINATING ENGINEERING SOCIETY NORTH AMERICA

7. AESTHETIC QUALITIES OF DAYLIGHTING
 DAYLIGHT IS DYNAMIC
 FULL SPECTRUM
PHOTO CREDIT: GREENSOURCE MAGAZINE
PHOTO CREDIT: LRC DAYLIGHTING DIVIDENDS

8. ENERGY EFFICIENT QUALITIES OF
DAYLIGHTING
EFFICACY OF LIGHT SOURCE (LUMENS/WATT)
 INCANDESCENT (16-40 LUMENS/WATT)
 FLUORESCENT (90-100 LUMENS/WATT)
 DIFFUSE SKY LIGHT (125-150 LUMENS/WATT)
SOURCE: HIGH TECH HIGH CHULA VISTA

9. BEST BUILDING FOOTPRINTS FOR
DAYLIGHTING
 LONG AND NARROW
FOOTPRINT
 ORIENT LONG AXIS
RUNNING EAST/WEST
 HIGH PERCENT OF
PERIMETER AREA
IESNA RP-5

10. TOPLIGHTING
-OPENINGS IN THE ROOF PLANE-
 ONE-STORY
BUILDINGS
 TOP FLOOR OF
MULTI-STORY
BUILDINGS
 REPRESENTS
~60% OF SOURCE: IESNA
COMMERCIAL
FLOOR SPACE

11. SAWTOOTHS, MONITORS &
CLERESTORIES
 DELIVERS DAYLIGHT
DEEPER INTO SPACE
 ORIENTATION HAS
AN IMPACT
 CLEAR GLAZING
(WHEN NORTH-
FACING)
CHAPARRAL HIGH SCHOOL
 MORE CHALLENGING
TO DARKEN SPACE

12. SKYLIGHTS
3% - 5%
SKYLIGHT
TO
FLOOR
AREA
RATIO
SOURCE: VELUX

13. TUBULAR DAYLIGHTING DEVICES
SOURCE: SOLATUBE

14. SIDELIGHTING -VERTICAL GLAZING-
PHOTO CREDIT: KALWALL
USEFUL ON ANY LEVEL OF
A BUILDING
PHOTO CREDIT: LRC DAYLIGHT DIVIDENDS

15. SIDELIGHTING GLAZING LOCATIONS
EXAMPLE BUILDING IN LOS ANGELES

16. HIGH PERFORMANCE GLAZING
 Visible Light Transmittance (VLT)
 Solar Heat Gain Coefficient (SHGC)
SOURCE: PPG

17. HIGH PERFORMANCE GLAZING
LIGHT TO SOLAR GAIN FACTOR
LSG FACTOR = VLT/SHGC
SOURCE: PPG

18. IMPORTANCE OF TYPE & SIZE
OF GLAZING

19. EXTERIOR SHADING STRATEGIES
N ORTHERN H EM I SP HERE

20. OVERHANGS (SOUTH)
SOURCE: WHOLE BUILDING DESIGN GUIDE
SAN DIEGO CLIMATE – ALSO CONSIDER SHADING AT
EQUINOX (SEPTEMBER 21)

21. FINS (EAST & WEST)
SOURCE: ILLUMINATING ENGINEERING SOCIETY NORTH AMERICA

22. EXTERIOR SHADING STRATEGIES
SCREEN
SOURCE: NY TIMES BUILDING
SOURCE: NY TIMES BUILDING

23. EXTERIOR SHADING STRATEGIES
SAN ELIJO LAGOON VISITOR’S CENTER
WATER LIFE MUSEUM, HEMET

24. SOURCE: ADVANCED LIGHTING GUIDELINES
LIGHT SHELF (SOUTH)
Photo Credit: Ash Creek
Elementary, Monmouth,
OR by BOORA Architects

25. INTERIOR SHADING STRATEGIES
Photo Credit: MechoShade
VIEW-PRESERVING
FABRIC SHADES

26. INTERIOR SHADING STRATEGIES
BLACKOUT FABRIC SHADES
ARCHITECTS HANNAH GABRIEL WELLS HEADQUARTERS
ARCHITECTS HANNAH GABRIEL WELLS HEADQUARTERS

27. INTERIOR SHADING STRATEGIES
BLINDS
(NOTICE SEPARATE
CONTROL OF VIEW &
DAYLIGHT SECTION OF
WINDOW)

28. INTERIOR SHADING STRATEGIES
VERTICAL BLINDS
(EAST & WEST FAÇADE)
HORIZONTAL BLINDS
(SOUTH FAÇADE)

29. INTERIOR DESIGN TO OPTIMIZE
DAYLIGHTING
 LIGHT-COLORED SURFACES
 AVOID ‘CAVE’ EFFECT WITH
LIGHT-COLORED CEILING

30. DESIGN ELECTRIC LIGHTING FOR
DAYLIT SPACES
 TASK/AMBIENT
DESIGN
 DIRECT/INDIRECT
LIGHTING
 ORIENT PARALLEL TO
WINDOW
 LAMP COLOR
TEMPERATURE
(MIN. 4100K)

31. ZONE ELECTRIC LIGHTING FOR
DAYLIGHT RESPONSIVE CONTROL
IESNA RP-5

32. THE NEED FOR AUTOMATIC CONTROLS

33. PROVIDE DAYLIGHT RESPONSIVE
CONTROLS FOR ELECTRIC LIGHTING
Credit: LC&D, Lutron & WattStopper

35. COMMISSIONING & MAINTENANCE
OF
AUTOMATIC CONTROLS
SAN ELIJO LAGOON VISITOR’S CENTER

36. COMMISSIONING & MAINTENANCE
OF AUTOMATIC CONTROLS
A DAYLIT SPACE
NOT A DAYLIT SPACE . . . YET

37. TITLE 24 2008 & DAYLIGHTING

38. TITLE 24 2008 - DAYLIT ZONES
SIDELIGHTING
SOURCE: CA TITLE24 NONRES MANUAL

39. TITLE 24 2008 - DAYLIT ZONES
TOPLIGHTING
SOURCE: CA TITLE24 NONRES MANUAL

40. TITLE 24 2008 – CONTROL CREDITS

42. LEED & DAYLIGHTING
INDOOR ENVIRONMENTAL QUALITY CATEGORY
IEQC8.1 – DAYLIGHT
-PROVIDE ADEQUATE DAYLIGHT FOR 75% OF
REGULARLY OCCUPIED SPACES
MED IMPACT – LEED GOLD CERTIFIED
SDCCD WEST CITY CENTER – LEED GOLD CERTIFIED

43. LEED DAYLIGHT CREDIT IEQC8.1
CALCULATION METHODS
LEED v2 LEED v3
Option 1
Option 1
Glazing Factor
Simulation
Calculation
Option 2
Daylight Option 2
Simulation Prescriptive
Model
Option 3
Option 3
Daylight
Measurement
Measurement
Option 4
Combination

44. LEED DAYLIGHT CREDIT IEQC8.1
PRESCRIPTIVE CALCULATIONS
LEED v2 LEED v3
Option 1
Option 1
Glazing Factor
Simulation
Calculation
Option 2
Daylight Option 2
Simulation Prescriptive
Model
Option 3
Option 3
Daylight
Measurement
Measurement
Option 4
Combination

45. LEED PRESCRIPTIVE CALCULATIONS
V2.2 V3 (2009)
 ACHIEVE A MINIMUM 2%  FORMULA BASED ON
GLAZING FACTOR IN AT GEOMETRY AND
LEAST 75% OF ALL
GLAZING VLT
REGULARLY OCCUPIED
SPACES.
 ACHIEVABLE IN
VERY LIMITED
 RELATIVELY EASY TO
COMPLY TYPES OF SPACES
 BASED ON GEOMETRY &
GLAZING VLT ONLY

46. LEED DAYLIGHT CREDIT IEQC8.1
PERFORMANCE CALCULATIONS
LEED v2 LEED v3
Option 1
Option 1
Glazing Factor
Simulation
Calculation
Option 2
Daylight Option 2
Simulation Prescriptive
Model
Option 3
Option 3
Daylight
Measurement
Measurement
Option 4
Combination

47. LEED PERFORMANCE CALCULATIONS
V2.2 V3 (2009)
 COMPUTER SIMULATION  COMPUTER SIMULATION
NOON ON EQUINOX 9AM AND 3PM ON
(SEPT. 21) EQUINOX
(SEPT. 21)
 MINIMUM ILLUMINANCE
25FC  10FC < ILLUMINANCE <
500FC

48. TOP 4 THINGS TO REMEMBER . . .
1. MAKE DAYLIGHTING A PRIORITY IN YOUR PROJECT
2. START EARLY IN THE DESIGN
3. PROVIDE AUTOMATIC DAYLIGHTING CONTROLS
4. COMMISSION THE SYSTEM & EDUCATE THE USERS

49. OPTIMIZING DAYLIGHTING STRATEGIES
PRESENTED BY:
Sandy Houck, LEED AP, LC
shouck@brummitt.com
August 18, 2011
B R U M M I TT E N E R G Y A S S O C I AT E S , I N C .
Helping people achieve very energy efficient buildings