Whats New Leed 2009 Lorman Ppt

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WhatWhatWhat’’’s New for LEEDs New for LEEDs New for LEED®®® in 2009:in 2009:in 2009:The Overhaul of the U.S. Green The Overhaul of the U.S. Green The Overhaul of the U.S. Green

Building Council LEEDBuilding Council LEEDBuilding Council LEED®®® ProgramProgramProgram

Bion D. Howard, ConsultantBuilding Environmental Science & Technology (B.E.S.T.)

Web: http://www.http://www.energybuilderenergybuilder.com/.com/

© 2008. Lorman Educational Services

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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.

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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.

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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.

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Sustainable Development Principles (cont.)

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

• Improved quality of life • Stabilized use of our

environment’s naturalresource supply

• Revise policies andpractices at all levels

• Understand consequencesof inaction

• Innovative changes needed toinstitutional structures

• Education used to influenceindividual citizen behaviors.

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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

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Buildings Energy Usage

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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

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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.

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Green Design Intersections

Composite by B.E.S.T.

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Role of green building in meeting sustainable design criteria

•• Site planningSite planning… ecological design decreases runoff, erosion, sedimentation, top-soil loss; long term benefits

•• “Embodied” energy“Embodied” energy and pollution impacts from building materials are reduced by considering life-cycle benefits and costs, incl. externalities

•• Energy wasteEnergy waste in green buildings is often reduced by >30%; with 50% overall energy efficiency improvement a new USGBC goal

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Role of green building in meeting sustainable design criteria (cont.)

•• Potable waterPotable water efficiency enhanced inside and out; efficient delivery, irrigation alternatives, and catching rainwater

•• ResourcesResources respected through source reduction, reuse where possible, using higher portions of renewable-based recycled goods, and implementing comprehensive recycling programs

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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)

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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

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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

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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)

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New Green Building Cost/Benefit Study 2008

“Greener Buildings and Communities: Costs and Benefits.”By: GoodEnergies.com / Greg KatzFinancial 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.)

“Greener Buildings and Communities: Costs and Benefits.”

By: GoodEnergies.com / Greg Katz

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.)

“Greener Buildings and Communities: Costs and Benefits.”

By: GoodEnergies.com / Greg Katz

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.

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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

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Why LEED® was createdWhat 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

Source: US Green Building Council, 8/2006

OTHER3%

LIBRARY3%

K-12 EDUCATION

6%

MULTI USE32%

COMMERCIAL OFFICE

14%

HIGHER EDUCATION

7%

MULTI-UNITRESIDENTIAL

3%

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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 SupportReference PackageCredit Inquiries and Rulings (CIR)

• Step 3: Building CertificationUpon documentation submittal

and USGBC review

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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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Example LEED® Points levelsLevel NC 2.2 EB O&MCertified 26 - 32 points 34 - 42 pointsSilver 33 - 38 points 43 - 50 pointsGold 39 - 51 points 51 - 67 pointsPlatinum 52 + points 68 - 92 points

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

Overview: LEED® Credit Points

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New LEED® Points levelsLevel 2009Certified > 40 pointsSilver > 50 pointsGold > 60 pointsPlatinum > 80 points

Total base points 100“Bonus” 10 Innovation & Regionalization Points

…………………………….. 110 Possible

LEED® Credit Points (cont.)

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Overview: LEED® 2009 Structure

LEED 2009 Criteria

SS

WE

E&A

MR

EQ

I&D

Regional

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143510

156 4

Max = 110

Source: USGBC final ballot LEED 2009 Revisions

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LEED® 2009 Approach

Review of the final ballot proposed prerequisites and credits within

LEED® 2009 rating system

Photo source: Tandus NeoCon Team

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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

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LEED® 2009 ApproachImplementation of USGBC Revisions to LEED® (cont.)

WeightingsWeightings principle – effort to emphasize positive effects

of scientifically verifiable green building benefits.• Reduce carbon footprint• Less water waste• Human health benefits• Known environmental benefits

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WeightingsLEED® 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

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

Climate ChangeResources DepletionHuman Health “Criteria”Water “Intake”Human Health – “Cancerous?”Eco-toxicityEutrophication

Habitat AlterationHuman Health – “Non-cancerous”Smog FormationAcidification (impact on lakes)Indoor Air QualityOzone Depletion

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LEED® 2009 ApproachImplementation of USGBC Revisions to LEED (cont.)

Weightings (cont.) TRACI – Operating Structure (example case)

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LEED® 2009 ApproachAdministrative 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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LEED® 2009 ApproachAdministrative 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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LEED® 2009 ApproachStrategies: Sustainable SitesPrerequisite 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.

Photo: B. D. Howard

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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)


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LEED® 2009 ApproachStrategies: 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

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LEED® 2009 ApproachStrategies: 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

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Strategies: Sustainable Sites• 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)

SustainableSites.org


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Strategies: Sustainable Sites (cont.)

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 lineC) 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%

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LEED® 2009 ApproachStrategies: Sustainable Sites (cont.)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.

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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.

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LEED® 2009 ApproachStrategies: Sustainable Sites (cont.)

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

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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)

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

Source: USGBC.org

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Strategies: Water EfficiencyPrerequisite 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

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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

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LEED® 2009 ApproachStrategies: Water Efficiency (cont.) 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

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LEED® 2009 ApproachStrategies: Water Efficiency (cont.) 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

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LEED® 2009 ApproachCredits: Energy and Atmosphere (35 Pts avail.)

Source: USGBC.org

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LEED® 2009 ApproachStrategies: 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

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Source: tomkonrad.com/blog

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Prerequisite 1 – Fundamental building commissioningVerify 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 ManagementEither 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.

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LEED® 2009 ApproachStrategies: Energy and AtmosphereCredit 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

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LEED® 2009 ApproachStrategies: Energy and AtmosphereCredit 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

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Strategies: Energy and AtmosphereCredit 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 majorenergy-using systems as specified in Reference Guide.

• Note – new industry standards referenced for this credit expected.

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Strategies: Energy and AtmosphereCredit 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)

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Strategies: Energy and AtmosphereCredit 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

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Strategies: Energy and AtmosphereCredit 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

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Credits: Materials and Resources ( 14 Pts avail.)

Source: USGBC.org

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Strategies: Materials and ResourcesPrerequisite 1 – Collection and Storage of

RecyclablesThis pre-req. remains unchanged in LEED® 2009

Provide accessible dedicatedarea serving the entire project, for collection andstorage of recyclable material.

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Strategies: Materials and ResourcesRationale: minimize wastes; use environmentally preferable materials; employ renewable, recycled and recyclable materials wherever possible. CREDIT 1 (Revised to 4 points, was 3 Points)• 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 ElementsCREDIT 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

© Corbis Images


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LEED® 2009 ApproachStrategies: Materials and ResourcesCREDIT 3 (up to 2 Points)• Credit 3.1: Materials Reuse: 5% • Credit 3.2: Materials Reuse: 10%CREDIT 4 (up to 2 Points)

• Credit 4.1: Recycled Content: 10% (post-consumer + 1/2 pre-consumer)

• Credit 4.2: 20% (post-consumer + 1/2 pre-consumer)CREDIT 5 (up to 2 Points)• 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)

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LEED® 2009 ApproachCredits: Indoor Environmental Quality

(Revised to 15 Points, was 19 Point section)

Source: USGBC.org

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LEED® 2009 ApproachIndoor Environmental Quality remains a

vital concern in all buildings.

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Strategies: Indoor Environmental QualityPrerequisite 1 – Minimum IAQ Performance

Meet ASHRAE Standard 62.1–2007 Ventilation Rate met underall 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

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Strategies: Indoor Environmental QualityCredit 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

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LEED® 2009 ApproachStrategies: Indoor Environmental QualityCredit 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


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LEED® 2009 ApproachStrategies: Indoor Environmental QualityCredit 3 – Construction IAQ Management Plan

(up to 2 Points)

• Credit 3.1: During ConstructionSMACNA IAQ Control guidelines (1995 reference)Protect materials stored on site from contaminationProtect 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.


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LEED® 2009 ApproachStrategies: Indoor Environmental QualityCredit 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)


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Strategies: Indoor Environmental QualityCredit 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 forindividual 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

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Strategies: Indoor Environmental QualityCredit 7 Thermal Comfort: (up to 2 Points)

• 7.1: Thermal Comfort: Design • 7.2: Thermal Comfort: VerificationInstall a permanent monitoring system to ensure ongoing buildingperformance 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

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Innovation in DesignCredits: Innovation & Design Process

( Revised to 6 Points avail.)

Note: previously 4 points were available. For 2009 version, LEEDSteering 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

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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

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LEED® 2009 ApproachStrategies: 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

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LEED® 2009 ApproachSome 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 efficiencyDesigners need to increase energy efficiency attainment to lessen Global Warming emissionsCommissioning buildings is vital for performanceWater efficiency is both practical and cost-effectivePreventing/correcting indoor environmentalproblems yields large productivity benefitsRecycling plan is vital; enabling building componentsto be recycled at end of life

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Additional Information Sources

•• U.S. Green Building CouncilU.S. Green Building Council –– Links PageLinks Pagehttp://www.http://www.usgbcusgbc.org/.org/DisplayPageDisplayPage..aspxaspx??CMSPageIDCMSPageID=76=76

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

•• Building Green / Building Green / Environmental Building NewsEnvironmental Building Newshttp://www.http://www.BuildingGreenBuildingGreen.com.com

•• US EPA Green Building PortalUS EPA Green Building Portalhttp://www.epa.gov/greenbuilding/pubs/components.htmhttp://www.epa.gov/greenbuilding/pubs/components.htm

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

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Additional Information

LEED 2009 Reference GuideWhen 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=1762http://www.usgbc.org/DisplayPage.aspx?CMSPageID=1762

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Thank you for your kind attention!

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

Bion D. Howard, ConsultantBuilding Environmental Science & Technology

Web: http://www.http://www.energybuilderenergybuilder.com/.com/

© 2008. Lorman Educational Services