Whats New Leed 2009 Lorman Ppt

What’s New for LEED® in 2009:
The Overhaul of the U.S. Green
Building Council LEED® Program
Bion D. Howard, Consultant
Building Environmental Science & Technology (B.E.S.T.)
Web: http://www.energybuilder.com/

© 2008. Lorman Educational Services

1

Teleconference Goals
• Understand how the U.S. Green Building
Council is revising and updating the LEED®
rating and certification system for 2009.
• Review key provisions receiving attention:
Sustainable Sites, Water Efficiency, Energy
and Atmosphere, Materials, and IEQ.
• Discuss the new approach developed to
consider regional environmental conditions.
• Review unified distribution of LEED® credit
points approach.

2

Teleconference Disclaimer
• This teleconference is based on detailed research on
the current and proposed criteria of the U.S. Green
Building Council’s “Leadership in Energy and
Environmental Design” - LEED® - program and rating
systems. It has been developed, and is presented, by a
recognized green building professional, but has not
been reviewed, approved or sanctioned in any way by
the USGBC.
• All materials referring to LEED® 2009 should be
considered “pre-release” since at the time of
preparation, the final documents had not been released
by USGBC.

3

Sustainable Development Principles

"Sustainable development…
meeting needs of the present
without compromising the ability
of future generations to meet their
own needs."

Source: Our Common Future. 1987. World Commission on Environment
and Development (WCED). Oxford, UK. Oxford University Press.

4

Sustainable Development Principles (cont.)

• Improved quality of life • Understand consequences
• Stabilized use of our of inaction
environment’s natural • Innovative changes needed to
resource supply institutional structures
• Revise policies and • Education used to influence
practices at all levels individual citizen behaviors.

Source: Our Common Future. 1987. World Commission on Environment
and Development (WCED). Oxford, UK. Oxford University Press.

5

Buildings’ Environmental Impacts
U.S. buildings account for:
• 70% of electricity consumption
• 39% of total energy use
• 39% of greenhouse gas emissions
• 40% of raw materials use
• 30% of waste output (136 to 150 million tons/yr)
• 12% of potable water consumption

Source: The U.S. Green Building Council, 2008
6

Buildings Energy Usage

7

What is Green Building?
Green buildings are structures that more
efficiently use valuable resources such
as energy, water, materials, and land
compared to buildings constructed to
basic building codes.
Green buildings are better for the
environment, and provide healthy,
comfortable, productive indoor spaces.

Source: US Green Building Council, Washington, DC USA

8

What is Green Building? (cont.)
Top level desired outcomes (Source: USGBC)
• develop new and remodeled existing structures
that provide stable, sustainable energy supplies
and climate conditions;
• sufficient clean, and renewable water resources;
• restorative use of land for the long term habitat
sustainability;
• restorative use of materials and assemblies that
reflect life-cycle impacts; and
• a built environment that enhances human safety,
security, health and productivity.
9

Green Design Intersections

Composite by B.E.S.T.

10

Role of green building in meeting
sustainable design criteria
• Site planning… ecological design decreases
planning
runoff, erosion, sedimentation, top-soil loss; long
term benefits
• “Embodied” energy and pollution impacts from
building materials are reduced by considering
life-cycle benefits and costs, incl. externalities
• Energy waste in green buildings is often reduced
by >30%; with 50% overall energy efficiency
improvement a new USGBC goal

11

Role of green building in meeting
sustainable design criteria (cont.)
• Potable water efficiency enhanced inside and
out; efficient delivery, irrigation alternatives, and
catching rainwater
• Resources respected through source reduction,
reuse where possible, using higher portions of
renewable-based recycled goods, and
implementing comprehensive recycling programs

12

Productivity Benefits to
Business and Institutions
Big bottom line impact !
• Green design can cut national productivity losses by est.
$30 - $170 billion/year through better IEQ (LBNL 1998)
Absenteeism and turnover reduced
• Healthy workplaces = more satisfied employees (RMI, ING Bank)
Improved occupant performance
• Student performance boosted in day-lighted schools
(Innovative Design, NC)

Retail sales increase with daylighting store spaces
• Studies have shown ~40% improvement
(Hershong/Mahone 1999, Innovative Design, Inc. 1994-1998)

13

Green Building
Market is Expanding
• “U.S. green building market is accelerating
at a dramatic rate.”
• “The value of green building construction
starts was up five-fold from 2005 ($10
billion) to 2008 ($36-$49 billion), and could
triple by 2013, reaching $96-$140 billion.”
Source: McGraw-Hill Construction's Green Outlook 2009

14

Green Building
Market
• Since 2005, the perceived benefits of green building
have increased and differentiated as people become
more knowledgeable about green building.
• The decrease in operating costs is the most often
cited benefit (13.6%, up from 8-9% in 2005),
followed by the increase in building values (10.9%,
up from 7.5% in 2005).

Source: McGraw-Hill Construction's Green Outlook 2009

15

Does Green Building
Cost Much More?
2004 study of cost implications of pursuing each
LEED point, found "no statistically significant
difference between the LEED population and the
non-LEED (building) population."
• Compared 45 LEED buildings with 93 conventional buildings.
• Report offered clear evidence; if there is any premium associated
with building green, it is far less significant than a range of other
factors that affect building cost.
Source: "Costing Green: A Comprehensive Cost Database and Budgeting
Methodology," 2004. By Lisa Fay Matthiessen and Peter Morris of Davis Langdon
Adamson (DLA)

16

New Green Building
Cost/Benefit Study 2008
“Greener Buildings and Communities: Costs and Benefits.”
By: GoodEnergies.com / Greg Katz
Financial and technical analysis of 150 green building projects in U.S. and 10 other
countries.
Report highlights -- BENEFITS --
• Hard Value – c. 50% of buildings saw initial green premium paid-back by energy and water
savings in < 5 years.
• Energy savings alone make green buildings cost effective. 20 year present value of energy
savings ranged from $7 per square foot to $14/sf (office buildings)
• The benefits look even better when water savings and health and productivity benefits
included.
• Total health and transportation related savings: $5-$30/sf
– Annual transportation savings / household: $600-$700/ HH or $4000 w/ one less car
– Annual health savings: $100-$200/person

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New Green Building
Cost/Benefit Study 2008 (cont.)

Report highlights – COSTS --
• Most green buildings cost 0% to 4% more than business-as-usual buildings.
– Median “green premium” = 1.6% increase; Mean = 2.5%.
– The average additional cost = between $3/sf and $8/sf.

• Way lower than “public perception.”
E.G: World Business Council for Sustainable Development survey of business
leaders “believe” GB’s cost average 17% more (opinion is a clear outlier).

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New Green Building
Cost/Benefit Study 2008 (cont.)
Report highlights – MARKET FACTORS --
• Green buildings increase market value through higher sales/rental rates,
increased occupancy and lower turnover compared with conventional
buildings.
• Green commercial properties sell for a 3%-5% premium, and
• In markets where didn’t find a premium, higher occupancy, faster leasing, and
quicker resale factors were observed.

19

Overview:
U.S. Green Building Council

Mission: “to promote the design and
construction of buildings that are
environmentally responsible, profitable,
and healthy places to live and work.”
Org. structure designed around firms dedicated to
improving energy and environmental performance
of the built environment

Formed: c. 1993. Green Pioneers David Gotfried, Mike Italiano

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Principles of LEED®
(Leadership in Energy & Environmental Design)

A consensus rating system based on accepted
energy and environmental principles, that
strives to strike a balance between proven
practices and emerging concepts.
LEED® encourages a holistic approach that
guides an integrated and collaborative
design, construction, and O&M process
throughout the building's life cycle.
Source: The U.S. Green Building Council, 2006

21

Why LEED® was created
What is it, and why does it matter?
• No consensus existed pre ~1997 effectively defining
and characterizing what an environmental building
really was until US GBC created LEED®.
• Building consumers needed consistent information to
help avoid growing misrepresentation or “green-wash.”
• Industry needed consistent guidelines to help foster a
“value-proposition” for environmental products and
services.
• Financing green building construction required more
accurate cost / benefit analysis based on proper
information concerning criteria (what really is green).

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LEED® Products Matrix

Source: USGBC web site 9/2008
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Building Types
Covered By LEED®
• LEED-NC: New Construction and Major Renovations/Additions
commercial and institutional buildings (2000, updated 2005; 2009)
• LEED-EB: Existing Buildings (2004, O&M 2008; 2009)
• LEED-CI: Commercial Interiors (public release: 2004, 2009)
• LEED-CS: Core and Shell (public release: 2005; 2009)
• LEED for Schools: Application Guide (R.O. 2008, 2009)
• LEED-ND: Neighborhood Development Guide (R.O. late ’08)
• LEED Retail: Guide for retail facilities pilot test (2009 release)
• LEED-HC: Guide for Health Care Facilities (in development)
• LEED-Homes: Residential (R.O. 11-2007)
Status as of Nov. 2008; Source: USGBC
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LEED® Registered Projects By Type
OTHER
3% MULTI USE
32%
MULTI-UNIT
RESIDENTIAL
3%

COMMERCIAL
OFFICE
LIBRARY
14%
3%
K-12 HIGHER
EDUCATION EDUCATION
6% 7%

Source: US Green Building Council, 8/2006

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Who is Using LEED®?
• ~ 11,000 Registered Projects
• ~ 1,600 Certified buildings
• ~ 1,200 LEED® for Homes certified projects
• > 50,000 LEED®-accredited Professionals
• ~ 17,500 USGBC members
• ~ 7,300 USGBC affiliated organizations
• ~ 80+ Chapters and international spin-offs
• ~ 80+ Governmental agency LEED® adoptions

Sources: The U.S. Green Building Council;
BuildingGreen.com; RealLEED.com, 11/2008
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LEED® Certification
Three step process:
• Step 1: Project Registration
LEED® Letter Templates, CIR access,
and on-line project listing
• Step 2: Technical Support
Reference Package
Credit Inquiries and Rulings (CIR)
• Step 3: Building Certification
Upon documentation submittal
and USGBC review

27

Introduction:
LEED® 2009 Products

LEED® 2009

Obtain PDF copy of guide & rating system here:

http://www.usgbc.org/ShowFile.aspx?DocumentID=3617

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Overview: LEED® Credit Points

Example LEED® Points levels
Level NC 2.2 EB O&M
Certified 26 - 32 points 34 - 42 points
Silver 33 - 38 points 43 - 50 points
Gold 39 - 51 points 51 - 67 points
Platinum 52 + points 68 - 92 points

(69 possible) (92 Possible)
2005 – ’08 9/2008

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LEED® Credit Points (cont.)

New LEED® Points levels
Level 2009
Certified > 40 points
Silver > 50 points
Gold > 60 points
Platinum > 80 points

Total base points 100
“Bonus” 10 Innovation & Regionalization Points
…………………………….. 110 Possible

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Overview: LEED® 2009 Structure
SS
LEED 2009
Criteria WE
E&A
6 4 26 MR
15 EQ
I&D
10 Regional
35 14

Max = 110

Source: USGBC final ballot LEED 2009 Revisions
31

LEED® 2009 Approach
Review of the final ballot proposed
prerequisites and credits within
LEED® 2009 rating system

Photo source: Tandus NeoCon Team

32

Principal Goals of USGBC 2009 Revisions to LEED®
• Harmonize rating systems
• Align credits from various scales to 0 to 100 scale plus,
Regional and Innovation & Design Process
• Adjunct section introduces regionalized innovation points;
special criteria to be developed locally
• Increased focus on electronic submittals and evaluation
– “Bookshelf” concept – increase electronic submittals
– Credit alignments (address credit drift from one product
to another EX- Homes, Neighborhood Development)
– Reference Guide, and electronic updates

33

Implementation of USGBC Revisions to LEED® (cont.)
Weightings
Weightings principle – effort to emphasize positive effects
of scientifically verifiable green building benefits.
• Reduce carbon footprint
• Less water waste
• Human health benefits
• Known environmental benefits

34

Weightings
LEED® 2009 weighting approach -- six interacting factors
allow decisions about relative points allocation
• The prototype building (typ. office building)
• Impact categories
• Credit groups
• Transportation
• Credit adjustments
• Point reallocation

35

Weightings (cont.)
Top Down Hierarchy based on evaluations EPA TRACI, & NIST/BEES

Climate Change Habitat Alteration
Resources Depletion Human Health – “Non-
Human Health “Criteria” cancerous”
Smog Formation
Water “Intake”
Acidification (impact on
Human Health – “Cancerous?” lakes)
Eco-toxicity Indoor Air Quality
Eutrophication Ozone Depletion

36

Implementation of USGBC Revisions to LEED (cont.)
Weightings (cont.)
TRACI – Operating Structure (example case)

37

Administrative Reconfiguration
• The USGBC is creating a “bookshelf” of credits that
apply to diverse LEED® rating standards.
• Early in 2008, USGBC moved administration of the
LEED® certification process to Green Building
Certification Institute (GBCI), a separate nonprofit
organization established 2007 with USGBC support.
• GBCI will deliver an ISO-compliant certification process
able to grow with the green building movement.
• USGBC has predicted an overall ability to meet the
activities of up to a million users of its system in coming
years (Scott Horst quoted at GreenBuild 2008).

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Administrative Reconfiguration
The certification process for LEED® accredited professionals is
changing too:

Source: USGBC.org / GreenBuild 2008
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Credits: Sustainable Sites ( 26 Points available)

Source: USGBC.org

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Strategies: Sustainable Sites Photo: B. D. Howard

Prerequisite 1 – Construction Activity
Pollution Prevention
Rationale: Prevent pollution; reducing runoff,
conserve natural vegetation, consider natural energy
sources during site selection, development processes.
Create Erosion and Sedimentation plan, at least
complying with US EPA Construction General
Permit, or local standards where they are more
stringent.

41


Strategies: Sustainable Sites
• Credit 1: Site Selection ( 1 Point)
• Credit 2: Development Density & Community
Connectivity (Revised 5 Points, was 1 pt.)
• Credit 3: Brownfield Redevelopment ( 1 Point)

42

Strategies: Sustainable Sites (cont.)
Credit 2 (5 Pts.) – Development Density &
Community Connectivity (increased points)
Intent -- Channel development (re-development) to
urban areas with existing infrastructure to reduce impacts
upon “greenfields” (undeveloped areas) and preserve
habitat and natural resources
• Option 1 – Certify building meets required
development density, and show calculations
60,000 SF / Acre; surrounding buildings are at
least 2 stories height; signed statement

43

Strategies: Sustainable
Sites (cont.)
Credit 2 (5 Pts.)
• Option 2 – Community
Connectivity; submit
proximity information
concerning basic services
nearby; in ½ mile radius,
10 services types
Source: Paladino Consulting LLC;
USGBC LEED NC 2.2 Ref. Guide

44


Strategies: Sustainable Sites SustainableSites.org

• Credit 4: Alternative Transportation
(Revised 12 Points; was 5 points)
• Credit 5: Site Development (up to 2 Points)
• Credit 6: Stormwater Design (up to 2 Points)
• Credit 7: Heat Island Effects (up to 2 Points)
• Credit 8: Light Pollution Reduction (1 Point)

45

Credits 4.1 to 4.4 – Alternative Transportation
• Using these credits a LEED project can significantly
reduce the environmental impact of SOV (single occupant
vehicle) auto usage.
• Submit certifications of connectivity attainment
• Three options: A) location w/in ½ mile rail
B) location w/in ¼ mile bus line
C) connecting shuttle to A, or B type

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Credits 4.1 to 4.4 – Alternative Trans. (cont.)
• Provide bicycle storage and changing rooms
• Support infrastructure for alternative fuel
vehicles
• Support for car-pooling, (5% of occupants) and
• Plan for telecommuters where they can reduce
their commuting frequency by ~ 20%

47

Credits 5.1, 5.2 – Protect, restore; Maximize
open space
• Plan to protect / restore existing natural areas at the site,
• Maximize open space to provide habitat and promote
biodiversity at/near the green building
• Steps (one point each):
– 5.1 Coverage of an area minimum 50% of the site area
excluding the building footprint itself
– 5.2 Coverage of an area minimum 75% of the site area
excluding the building footprint itself
• Alternative off-site areas may be applicable at a ratio of
no less than a 2 to 1 offset; under long term contract.

48

Credits 6.1, 6.2 – Stormwater Mangement
• Limit the disruption and pollution of natural water flows
by managing stormwater runoff.
• Steps (one point each):
– 6.1 Measures to mitigate at least 25% of the annual stormwater
from the building site
– 6.2 Measures to mitigate at least 50% of the annual stormwater
from the building site
• Provide for submittals describing the plan and its
execution, and how the plan will be recertified.

49

Credits 7.1, 7.2 – Heat Island Reduction
• Reduce thermal gradient differences between developed and
undeveloped areas – heat islands – to minimize environmental impact
• 7.1 Non-roof areas: provide shade for at least 30% of non-pervious
surfaces on site (four options available)
• 7.2 Roof areas: (A) put in place a roof system meeting the
requirements of the Energy Star “cool roofs” program tested in
accordance with ASTM standards, with emissivity of at least 0.9 over
75% of roof surface. (B) install and maintain a living “green” roof
system over 50% of roof surface area
• Combinations may be considered with proper documentation

50

Credit 8 – Light Pollution Reduction
• Eliminate light “trespassing” into the night sky, and
reduce impact on nocturnal environment.
• Option A: shield outdoor light fixtures of 50 W or more
or provide calculations that less than 5% of light reaches
the night sky
• Option B: alternative calculations considering
relationship between fixture mounting height and
property line (details in Reference Guide)

51

Credits: Water Efficiency (Revised, 12 Points
available, increased from 10 points)

Source: USGBC.org

52


Strategies: Water Efficiency
Prerequisite 1 – Minimum water efficiency
Revised – Boost by at least 20% the efficiency of water
using fixtures, installing water conserving features.
(Previously complied by meeting NAECA)

Calculate reductions compared to a 120% baseline
water.

Provide for recertification of water efficiency plan

53

Strategies: Water Efficiency (cont.)
Credits 1.1 & 1.2 – WE Landscaping
• Limit or eliminate use of potable water for landscape
irrigation demands
• Credit 1.1 – 50% reduction of potable water usage
• Credit 1.2 – No potable water usage (was 95% reduction)
• Submittals – Provide certification narrative of the system
effectiveness, specific reductions in potable water use
• Recertification – documentation and water-meter readings

54

Credit 2 – Innovative Wastewater Technologies
Reduce generation of wastewater and potable water
demand while increasing local aquifer recharge

• Option A – reduce potable water throughput to sewerage by
documented 50% based on Prereq. 1 calculations
• Option B – Treat 100% of wastewater outfall to tertiary standards.
Standards: < 10 mg/L BOD5 and 10 mg/L TSS (total suspended
solids)

• Key reference: USEPA “Onsite Wastewater Treatment Systems”
manual, EPA-625-R-00-002; 2002

* BOD: biological oxygen demand

55

Credits 3.1 & 3.2 – Water Use Reduction
Maximize fixture’ potable water efficiency

• Credit 3.1 – reduce by at least 30% fixture water usage
compared to calculated baseline levels (was 20%)
• Credit 3.2 – reduce by at least 40% fixture water usage
compared to calculated baseline levels (was 30%)

• Submittals – provided calculations and water meter data
to support the credits claimed; recertify annual water use

56

Credits: Energy and Atmosphere (35 Pts avail.)

57
Source: USGBC.org

Strategies: Energy and Atmosphere
Objectives: Enhance efficiency,
lower operating costs, reduced Carbon
emissions
• Integrated design approach
• LEED® energy-efficiency criteria
• Existing building “thermal envelope”
• HVAC equipment and distribution systems
• What about “climate specific” passive design?
• Commissioning building and systems

58


Source: tomkonrad.com/blog 59


Prerequisite 1 – Fundamental building commissioning
Verify and ensure building energy systems perform as intended…two
levels of certification: initial certs with a 5 year plan, and re-
certification documentation
Prerequisite 2 – Minimum energy performance (Revised)
A. Must demonstrate at least 10% superior performance compared
to ASHRAE Standard 90.1-2007; special case in California Title24.
B. Must show at least 5% improvement in Existing Building

Prerequisite 3 – Fundamental Refrigerant Management
Either show zero ozone depletion potential from operation of
equipment, or submit a third party verification that replacements to
comply are not economically feasible in the project.

60

Credit 1 – Optimize Energy Performance
• Conduct necessary computer modeling using ASHRAE
approved methods and guides to show increased energy
efficiency will be attained. Credits accrue as follows:

Note: EA Credit 1 in LEED NC 2.2 permitted up to 10 points
61

Credit 2 – On-site Renewable Energy (revised 7 points)
Encourage and recognize increasing levels of on-site and
off-site renewable energy to reduce environmental
impacts associated with fossil fuel energy use.
• Install approved renewable energy systems, as specified
in the rating system that supply electric power, or
metered thermal energy sources. Credits as follows:

Note: EA Credit 2 in LEED NC 2.2 permitted up to 3 points
62

Credit 3:– Enhanced Building Commissioning
(Revised 2 points, was 1 pt.)
• Commissioning Process – designate commissioning
authority prior to construction
• Develop total understanding of the operation of the
building’s major energy-using systems, options for
optimizing energy performance and a plan to achieve
energy savings
• Implement commissioning plan for building’s major
energy-using systems as specified in Reference Guide.
• Note – new industry standards referenced for this credit expected.

63

Credit 4: Enhanced Refrigerant Management
• Reduce ozone depletion and support early compliance
with the Montreal Protocol while minimizing direct
contributions to global warming.
• Option A (1 point)
Do not use refrigerants in base building
HVAC&R systems.
• Option B (1 point)
Select refrigerants and HVAC&R equipment that
minimize or eliminate the emission of compounds that
contribute to ozone depletion and global warming
(calculations are made using required formula)
64

Credit 5 –Measurement and Verification
(Revised 3 points, was 1 point)
• Provides information to support the ongoing
accountability and optimization of building energy
performance; identify opportunities for additional
energy-saving investments.
• Utilize computer-based building automation system
(BAS) that monitors and controls key building systems

65

Credit 6: Green Power (Revised 2 points, was 1 point)
(Not to be confused with on-site renewable energy supply credits)
• Determine baseline electricity use (or use results
calculated in assessment for Credit 1)
• Provide at least 35% of building’s electric
requirement from renewable sources;
• Must meet definition of Center for Resource
Solutions “GREEN-E” cert. requirements

66

Credits: Materials and Resources ( 14 Pts avail.)

Source: USGBC.org 67

Strategies: Materials and Resources
Prerequisite 1 – Collection and Storage of
Recyclables
This pre-req. remains
unchanged in LEED® 2009

Provide accessible dedicated
area serving the entire
project, for collection and
storage of recyclable material.

68

Rationale: minimize wastes; use environmentally
preferable materials; employ renewable, recycled and
recyclable materials wherever possible.
CREDIT 1 (Revised to 4 points, was 3 Points) © Corbis Images

• Credit 1.1: Building Reuse: Maintain 75%, Existing Walls,
Floors & Roof
• Credit 1.2: Maintain 95% of Existing Walls, Floors & Roof
• Credit 1.3: Maintain 50% of Interior Non-Structural Elements
CREDIT 2 (up to 2 Points)
• Credit 2.1: Construction Waste Management: Divert 50%
From Disposal
• Credit 2.2: Construction Waste Management: Divert 75%
From Disposal

69

• Credit 3.1: Materials Reuse: 5%
• Credit 3.2: Materials Reuse: 10%
• Credit 4.1: Recycled Content: 10% (post-consumer + 1/2 pre-
consumer)
• Credit 4.2: 20% (post-consumer + 1/2 pre-consumer)
• Credit 5.1: Materials: 10% Regionally Extracted, Processed &
Manufactured
• Credit 5.2: 20% Regionally Extracted, Processed & Manufactured
• Credit 6: Rapidly Renewable Materials (1 Point)
• Credit 7: Certified Wood (1 Point)

70

Credits: Indoor Environmental Quality
(Revised to 15 Points, was 19 Point section)

71
Source: USGBC.org

Indoor Environmental Quality remains a
vital concern in all buildings.

72


Strategies: Indoor Environmental Quality
Prerequisite 1 – Minimum IAQ Performance
Meet ASHRAE Standard 62.1–2007 Ventilation Rate met under
all normal building operating conditions.
Natural ventilated buildings will meet requirements in appropriate
section of ASHRAE Standard 62.1–2007
Prerequisite 2 – Environmental Tobacco Smoke (ETS)
Control
Option A: Prohibit smoking in building and designate exterior smoking
areas at least 25 feet from building entries, outdoor air intakes and
operable windows.
Option B: If A is infeasible then use designated smoking rooms and
establish negative pressure in rooms with smoking; 25’ away from
entrances
73


Credit 1: Outdoor Air Delivery Monitoring (1 Pt.)
• Install permanent, continuous monitoring systems that
provide feedback on ventilation system performance to
ensure that ventilation systems maintain minimum
outdoor rates under all operating conditions.
• For mechanical ventilation systems that predominantly
serve densely occupied spaces: have a CO2 sensor or
sampling location for each densely occupied space and
compare it with outdoor ambient CO2 concentrations
• Data can be integrated with EMCS in many cases.

IAQ Best Management Practices 74

Credit 2: Increased Ventilation (1 point)
• For mechanically ventilated spaces: Increase outdoor air
ventilation rates for all air-handling units serving
occupied spaces by at least 30% above min. ASHRAE
62.1–2007.
• Naturally ventilated spaces: follow manual -- “Good
Practice Guide 237: Natural Ventilation in Non-domestic
Buildings”(1998). Alt: CIBSE Applications Manual 10:
2005, “Natural Ventilation in Non-domestic Buildings.”

CIBSE: Chartered Institution of Building Services Engineers


Credit 3 – Construction IAQ Management Plan
(up to 2 Points)
• Credit 3.1: During Construction
SMACNA IAQ Control guidelines (1995 reference)
Protect materials stored on site from contamination
Protect air-handlers and grilles from contamination with filters
• Credit 3.2: Before Occupancy
– OPTION 1 – Flush out the building with fresh air operating in a
required temperature and humidity band
– OPTION 2 – Conduct air quality testing after construction ends
but prior to building occupancy using methods consistent with
US EPA guidelines.


Credit 4 – Low-emitting Materials
(up to 4 Points)
• Credit 4.1: Low-Emitting Materials:
Adhesives & Sealants
• Credit 4.2: Low-Emitting Materials:
Paints & Coatings
• Credit 4.3: … Carpet Systems
• Credit 4.4: … Composite Wood & Agrifiber Products
Credit 5: Indoor Chemical & Pollutant Source
Control (1 Point)

Credit 6.1: Controllability of Lighting (1 Point)
Credit 6.2: Controllability of Thermal Comfort (1 Point)
These are high-value options, which has been shown to increase
occupant productivity and comfort levels.
• Provide high levels of lighting and thermal comfort control for
individual occupants or specific groups in multi-occupant spaces
(e.g., classrooms or conference areas) to promote the productivity,
comfort, and well-being of building occupants
• Use controls that enable adjustments to suit the task needs and
preferences of individuals for at least 50% of individual workstations,
AND for groups sharing a multi-occupant space or working area for
at least 50% of multi-occupant space in the building.

IAQ – Occupant Comfort 78


Credit 7 Thermal Comfort: (up to 2 Points)
• 7.1: Thermal Comfort: Design
• 7.2: Thermal Comfort: Verification
Install a permanent monitoring system to ensure ongoing building
performance to the desired comfort criteria as determined by
ASHRAE Standard 55–2004, Thermal Comfort Conditions for Human
Occupancy.

Credit 8: Daylight & Views: (up to 2 Points)
• 8.1: Daylight available to 75% of Spaces
• 8.2: Views provided for 90% of Spaces

IAQ – Occupant Comfort 79

Innovation in Design
Credits: Innovation & Design Process
( Revised to 6 Points avail.)
Note: previously 4 points were available. For 2009 version, LEED
Steering Committee voted to grant a maximum of three points for
exemplary performance, in addition to 2 design points

Source: USGBC.org, A. Katz, 11/2008

80


Strategies: Innovation & Design Process

Credit 2: LEED® Accredited Professional
• Retain a LEED® Accredited Professional on
the project.
– At least one principal participant of the project team

Innovation in Design 81

Strategies: Regionalization (to be finalized)

• USGBC says "Regional Bonus Credits will be
identified by the USGBC Chapters and Regional
Councils for each ‘environmental zone’ and a
maximum of four points are available for project teams
to pursue. This work is currently underway.“
(USGBC Position as of Nov. ’08, delivery by May ’09)
• Expectation – USGBC Regions gain authority to
develop up to six potential bonus credits; a
particular project may pursue a maximum of four.
• Unknown – How each region handles balloting
process and how USGBC “approves” the resulting
credits. Stay tuned…

Innovation in Design 82

Some Lessons Learned 1999 - 2008
Energy efficiency usually best initial investment;
more glass is not always “better”
Renewable energy systems perform well on efficient
buildings; not so well if poor energy efficiency
Designers need to increase energy efficiency
attainment to lessen Global Warming emissions
Commissioning buildings is vital for performance
Water efficiency is both practical and cost-effective
Preventing/correcting indoor environmental
problems yields large productivity benefits
Recycling plan is vital; enabling building components
to be recycled at end of life
83

Additional Information Sources

• U.S. Green Building Council – Links Page
http://www.usgbc.org/DisplayPage.aspx?CMSPageID=76

Additional updates on LEED® 2009 emergence will be listed here.

• Building Green / Environmental Building News
http://www.BuildingGreen.com

• US EPA Green Building Portal
http://www.epa.gov/greenbuilding/pubs/components.htm

• US DoE High Performance Buildings
http://www.eere.energy.gov/buildings/highperformance/

84

Additional Information

LEED 2009 Reference Guide
When available, expected before May 2009, additional information on
the Reference Guide will be found here at US GBC:

Page Name: LEED Reference Documents

http://www.usgbc.org/DisplayPage.aspx?CMSPageID=1762

85

Thank you for your kind attention!

Now let’s begin the Q&A
segment of the session

Bion D. Howard, Consultant
Building Environmental Science & Technology

Web: http://www.energybuilder.com/

© 2008. Lorman Educational Services

86

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