OPTIMIZING DAYLIGHTING

STRATEGIES

PRESENTED BY:Sandy Houck, LEED AP, LC

August 18, 2011

Improving the performance and value of your buildings

GOALS MAKE DAYLIGHTING A PRIORITY IN DESIGN

START EARLY IN THE DESIGN PROCESS

PROVIDE AUTOMATIC DAYLIGHTING CONTROLS

PROVIDE COMMISSIONING & EDUCATE OCCUPANTS

DAYLIGHTING FOR

TASK-ORIENTED SPACES

PHO

TOCR

EDIT

: S

QU

ARE1

SUNLIT SPACE DAYLIT SPACE

WHAT WE DON’T WANT TO CREATE…

A SAUNA WHERE PEOPLE HAVE TO WORK

PHOTO CREDIT: DAYLIGHTING COLLABORATIVE

IT’S NOT EFFECTIVE

DAYLIGHT UNLESS THE

ELECTRIC LIGHTS

ARE OFF.

WHAT WE DON’T WANT TO CREATE…

A DOUBLE-LIT SPACE

DAYLIGHT AVAILABILITY

SOURCE: ILLUMINATING ENGINEERING SOCIETY NORTH AMERICA

DIRECT SUN

DIFFUSE SKY LIGHT

REFLECTED LIGHT

AESTHETIC QUALITIES OF DAYLIGHTING

DAYLIGHT IS DYNAMIC

FULL SPECTRUM

PHOTO CREDIT: GREENSOURCE MAGAZINE

PHOTO CREDIT: LRC DAYLIGHTING DIVIDENDS

ENERGY EFFICIENT QUALITIES OFDAYLIGHTING

SOURCE: HIGH TECH HIGH CHULA VISTA

EFFICACY OF LIGHT SOURCE (LUMENS/WATT) INCANDESCENT (16-40 LUMENS/WATT) FLUORESCENT (90-100 LUMENS/WATT) DIFFUSE SKY LIGHT (125-150 LUMENS/WATT)

BEST BUILDING FOOTPRINTS FORDAYLIGHTING

IESNA RP-5

LONG AND NARROWFOOTPRINT

ORIENT LONG AXISRUNNING EAST/WEST

HIGH PERCENT OFPERIMETER AREA

SOURCE: IESNA

ONE-STORYBUILDINGS

TOP FLOOR OFMULTI-STORYBUILDINGS

REPRESENTS

~60% OFCOMMERCIAL

FLOOR SPACE

TOPLIGHTING-OPENINGS IN THE ROOF PLANE-

CHAPARRAL HIGH SCHOOL

SAWTOOTHS, MONITORS & CLERESTORIES

DELIVERS DAYLIGHTDEEPER INTO SPACE

ORIENTATION HASAN IMPACT

CLEAR GLAZING(WHEN NORTH-FACING)

MORE CHALLENGINGTO DARKEN SPACE

SOURCE: VELUX

3% - 5% SKYLIGHT

TOFLOORAREARATIO

SKYLIGHTS

SOURCE: SOLATUBE

TUBULAR DAYLIGHTING DEVICES

USEFUL ON ANY LEVEL OFA BUILDING

PHOTO CREDIT: KALWALL

PHOTO CREDIT: LRC DAYLIGHT DIVIDENDS

SIDELIGHTING -VERTICAL GLAZING-

SIDELIGHTING GLAZING LOCATIONS

EXAMPLE BUILDING IN LOS ANGELES

HIGH PERFORMANCE GLAZING

Visible Light Transmittance (VLT) Solar Heat Gain Coefficient (SHGC)

SOURCE: PPG

HIGH PERFORMANCE GLAZING

LIGHT TO SOLAR GAIN FACTOR

LSG FACTOR = VLT/SHGC

SOURCE: PPG

IMPORTANCE OF TYPE & SIZEOF GLAZING

EXTERIOR SHADING STRATEGIES

NORTHERN HEMISPHERE

OVERHANGS (SOUTH)

SAN DIEGO CLIMATE – ALSO CONSIDER SHADING ATEQUINOX (SEPTEMBER 21)

SOURCE: WHOLE BUILDING DESIGN GUIDE

SOURCE: ILLUMINATING ENGINEERING SOCIETY NORTH AMERICA

FINS (EAST & WEST)

EXTERIOR SHADING STRATEGIES

SCREEN

SOURCE: NY TIMES BUILDING

SOURCE: NY TIMES BUILDING

EXTERIOR SHADING STRATEGIES

WATER LIFE MUSEUM, HEMET

SAN ELIJO LAGOON VISITOR’S CENTER

LIGHT SHELF (SOUTH)

Photo

Cre

dit:

Ash

Cre

ek

Ele

men

tary

, M

onm

outh

, O

R b

y BO

ORA A

rchitec

ts

SOURCE: ADVANCED LIGHTING GUIDELINES

INTERIOR SHADING STRATEGIES

Photo Credit: MechoShade

VIEW-PRESERVING

FABRIC SHADES

INTERIOR SHADING STRATEGIES

ARCHITECTS HANNAH GABRIEL WELLS HEADQUARTERS

BLACKOUT FABRIC SHADES

ARCHITECTS HANNAH GABRIEL WELLS HEADQUARTERS

INTERIOR SHADING STRATEGIES

BLINDS

(NOTICE SEPARATE

CONTROL OF VIEW &DAYLIGHT SECTION OF

WINDOW)

INTERIOR SHADING STRATEGIES

HORIZONTAL BLINDS

(SOUTH FAÇADE)

VERTICAL BLINDS

(EAST & WEST FAÇADE)

INTERIOR DESIGN TO OPTIMIZEDAYLIGHTING

LIGHT-COLORED SURFACES

AVOID ‘CAVE’ EFFECT WITHLIGHT-COLORED CEILING

DESIGN ELECTRIC LIGHTING FORDAYLIT SPACES

TASK/AMBIENTDESIGN

DIRECT/INDIRECTLIGHTING

ORIENT PARALLEL TOWINDOW

LAMP COLORTEMPERATURE

(MIN. 4100K)

ZONE ELECTRIC LIGHTING FOR

DAYLIGHT RESPONSIVE CONTROL

IESNA RP-5

THE NEED FOR AUTOMATIC CONTROLS

PROVIDE DAYLIGHT RESPONSIVECONTROLS FOR ELECTRIC LIGHTING

Credit: LC&D, Lutron & WattStopper

COMMISSIONING & MAINTENANCE

OF

AUTOMATIC CONTROLS

SAN ELIJO LAGOON VISITOR’S CENTER

COMMISSIONING & MAINTENANCE OF AUTOMATIC CONTROLS

NOT A DAYLIT SPACE . . . YET

A DAYLIT SPACE

TITLE 24 2008 & DAYLIGHTING

SIDELIGHTING

SO

URCE:

CA T

ITLE

24 N

ON

RES M

AN

UAL

TITLE 24 2008 - DAYLIT ZONES

TOPLIGHTING

SO

URCE:

CA T

ITLE

24 N

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RES M

AN

UAL

TITLE 24 2008 - DAYLIT ZONES

TITLE 24 2008 – CONTROL CREDITS

LEED & DAYLIGHTING

INDOOR ENVIRONMENTAL QUALITY CATEGORY

IEQC8.1 – DAYLIGHT

-PROVIDE ADEQUATE DAYLIGHT FOR 75% OFREGULARLY OCCUPIED SPACES

MED IMPACT – LEED GOLD CERTIFIED

SDCCD WEST CITY CENTER – LEED GOLD CERTIFIED

LEED DAYLIGHT CREDIT IEQC8.1

CALCULATION METHODS

LEED v2

Option 1

Glazing Factor Calculation

Option 2

Daylight Simulation

Model

Option 3

Daylight Measurement

LEED v3

Option 1

Simulation

Option 2

Prescriptive

Option 3

Measurement

Option 4

Combination

LEED DAYLIGHT CREDIT IEQC8.1

PRESCRIPTIVE CALCULATIONS

LEED v2

Option 1

Glazing Factor Calculation

Option 2

Daylight Simulation

Model

Option 3

Daylight Measurement

LEED v3

Option 1

Simulation

Option 2

Prescriptive

Option 3

Measurement

Option 4

Combination

V2.2

ACHIEVE A MINIMUM 2% GLAZING FACTOR IN ATLEAST 75% OF ALLREGULARLY OCCUPIEDSPACES.

RELATIVELY EASY TOCOMPLY

BASED ON GEOMETRY & GLAZING VLT ONLY

V3 (2009)

FORMULA BASED ON

GEOMETRY AND

GLAZING VLT

ACHIEVABLE IN

VERY LIMITED

TYPES OF SPACES

LEED PRESCRIPTIVE CALCULATIONS

LEED v2

Option 1

Glazing Factor Calculation

Option 2

Daylight Simulation

Model

Option 3

Daylight Measurement

LEED v3

Option 1

Simulation

Option 2

Prescriptive

Option 3

Measurement

Option 4

Combination

LEED DAYLIGHT CREDIT IEQC8.1

PERFORMANCE CALCULATIONS

V2.2

COMPUTER SIMULATIONNOON ON EQUINOX

(SEPT. 21)

MINIMUM ILLUMINANCE25FC

V3 (2009)

COMPUTER SIMULATION

9AM AND 3PM ONEQUINOX

(SEPT. 21)

10FC < ILLUMINANCE < 500FC

LEED PERFORMANCE CALCULATIONS

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

OPTIMIZING DAYLIGHTING STRATEGIES

PRESENTED BY:

Sandy Houck, LEED AP, LCshouck@brummitt.com

August 18, 2011

BRUMMITT ENERGY ASSOCIATES , INC .Helping people achieve very energy efficient buildings