LEED for Homes Rating System affordable market rate multi-family
LEED for Homes Rating System
affordable market rate multi-family
The top 25% of new homes based on performance and
environmental responsibility
Mainstream production and custom builders
TARGET MARKET
70%
REGULATIONSla
wbr
eake
rs
DEGREE OF GREEN
MARKET SHIFT
typical buildingpractices
market leadersinnovators
& risk takers20%5% 5%
Design and construction practices that meet specified standards reducing the negative impact of buildings on their occupants and on the environment.
LEED for Homes categoriesinnovation
and design
(ID)
sustainable
sites(SS)
location and
linkages
(LL)
indoor
environmental
quality
(IEQ)
materials and
resources
(MR)
water
efficiency
(WE)
energy and
atmosphere
(EA)
awareness
and
education
(AE)
Rating System
www.usgbc.org/leed/homes
LEED for Homes Project Checklist or
Scorecard
LEED for Homes Project Checklist
or Scorecard
How the Credit Structure Works
Credit #2: LandscapingIntent
Design and install landscape features that minimize demand for water and synthetic chemicals
RequirementsMandatory Measures
2.1Optional Measures
2.22.3
Verification / SubmittalsSynergies and TradeoffsAdditional Information
The Why
The What
The Review
LEED for Homes
Size Matters
LEED for Homes Size Adjuster
LEED for Homes Size
Adjuster
Discussion of Credits
Innovation and DesignLocations & Linkages
Sustainable SitesWater Efficiency
Energy and AtmosphereMaterial & Resources
Indoor Environmental QualityAwareness and Education
ID Credits
OverviewFour prerequisite measures9 points possible
Special FeaturesTo be used for innovative approaches to:
Exceed existing creditsAdopt new strategies / technologies not included in the rating system
Special process for verification (same as CIRs)USGBC will maintain a database of ID credits
LEED for Homes Innovation & Design ID2.1
LL Credits
OverviewParallel paths
Credit 1 (On-Hold), ORCredit 2 thru 6
No prerequisite measures10 points possible
Special FeaturesLL 3 Protect against sprawlLL 5 Minimize transportation needs
Sustainable Sites(SS)
The average U.S. citizen uses ten times the chemical fertilizer and pesticides on a lawn than the average farmer does on crops.
Source: the reporter, Fall 2003
SS Credits
Overview2 prerequisite measures21 points possible5 points required
Special FeaturesCompact development recognized and awardedSS 2 LandscapingSS 4 Surface water management
Water Efficiency (WE)
Per-capita water consumption is rising twice as fast as world population. At least 300 million people live in regions that already have severe water shortages; by 2025, the number could be 3 billion.
Source: PLANetWIRE
2.5 billion gallons of water are used every day to irrigate the world's golf courses.
Source: Time Magazine
WE Credits
OverviewNo prerequisite measure15 points possible3 points required
Special FeaturesWE 1 Rainwater & grey water systemsWE 2 High efficiency irrigation systemsWE 3 Indoor uses (lavatory, showers, toilets)
Energy and Atmosphere (EA)
If the global growth rate of energy use continues unchecked, the rate of worldwide energy consumption will double by 2035 and triple by 2055.
Source: WSSD
EA CreditsOverview
Parallel pathsCredit 1 ORCredit 2 thru 10 (except 7.1)
6 prerequisite measures38 points possible
Special FeaturesEA 1 Baseline of ENERGY STAR labeled homeEA 2 Pre-drywall inspection requiredEA 8 ENERGY STAR Advanced Lighting Package (ALP)EA 9 ENERGY STAR labeled appliancesEA10 Renewable electric generationEA 11 Residential refrigerant management
Materials and Resources (MR)
“Two-Thirds of World’s Resources Have Been Used-Up”Source: UK National Academy of Sciences, backed by 1,360 scientists from 95 countries.
MR Credits
Overview3 prerequisite measures14 points possible2 points required
Special FeaturesMR 1 Material efficient framingMR 2 Environmentally Preferable Products (EPPs)MR 3 Construction waste
LEED for Homes Environmentally
Preferable Products MR2.2
Delivery or Disposal?
Indoor Environmental Quality (IEQ)
In the U.S., the number of asthma sufferers grew by 75 percent between 1980 and 1994.
Source: Grist Magazine
Indoor Environmental QualityOverview
Parallel pathsCredit 1 ORCredit 2 thru 10
7 prerequisite measures20 points possible
Special FeaturesIEQ 2 Combustion ventingIEQ 4 Outdoor air ventilationIEQ 5 Local exhaustIEQ 7 Supply air filtrationIEQ 8 Contaminant controlIEQ 10 Garage pollution protection
Ventilation: 15 CFM per person + 0.01 CFM per sq. ft.
OR Prescriptive sizing table
OR(Refer to ASHRAE 62.2)
Equipment: Fans rated at < 1.5 sones
Controls: Accessible, labeled and operate > 8 hours/day
Awareness and Education (AE)
AE Credits
Overview1 mandatory measure1 point possible
Special FeaturesHA 1.1 Owner’s manual & walkthroughHA 1.2 Same + 3 hours training
Verification Process
Verification Process
Step 1: Preliminary Rating (by rater)1.1 Detailed plan review of a builder’s home design;
1.2 Performance testing of a typical example of builder’s homes;
1.3 Identify additional measures that may be needed; and
1.4 Preliminary LEED for Homes score / rating.
Verification Process
Step 2: Final Rating (by rater)2.1 Pre-drywall inspection;2.2 Final inspection and performance testing;2.3 Completion of project documentation file
(including: checklist, performance test reports, and accountability form); and
2.4 Final LEED for Homes scoring / rating.
Verification Process (cont’d)
Step 3: Certification (by Provider)3.1 Review of project documentation file that was prepared
by the rater
3.2 Completion of LEED for Homes rating
3.3 Presentation of LEED for Homes certificate to builder / homeowner.
3.4 Send notification of rating to USGBC
Verification Process (cont’d)
Resp.
Category Mandatory Optional
Performance TestingEnergy 1. ENERGY STAR Home Rater ⌧
3. Envelope Air Leakage Rater ⌧5. Duct Leakage Rater ⌧6. Refrigerant Charge HVAC ⌧
IEQ 4.3. Outdoor Air Flow Test Rater ⌧5.3 Exhaust Air Flow Test Rater ⌧6.2 Supply Air Flow Test Rater ⌧8.3 Contaminant Testing 3rd-Party ⌧
Special InspectionsEnergy 2.1 / 2.2 Insulation Raater ⌧ ⌧
Materials 4.2 Durability RaterEducation
Homowner Basic Walkthrough / Training Builder ⌧Awareness Comprehensive Walkthrough / Training Builder ⌧
Credit
List of Special Measures Performance Level
Instructions
General Information
Builder Name:
Subdivision Name:
House Address:
Provider's Name:
Rater's Name:
Sampling Protocol Used: (Y / N)
LEED Score: / 100 Points
LEED Rating Achieved: (Certified, Silver, Gold, Platinum)
HERS Score Achieved: / 100 Points
Location & Linkages Water Efficiency2 Site Selection 1.1 Water Reuse; Rainwater Harvesting
5.1 Average Housing Density >/= 7 Units / Acre 1.2 Water Reuse; Grey Water Reuse5.2 Average Housing Density >/= 10 Units / Acre 2.2 Irrigation System; High Efficiency Measures5.3 Average Housing Density >/= 20 Units / Acre Materials and Resources
Sustainable Sites 1 Smaller Home2.1 Basic Landscaping Design 4.1 Durability Plan; (Pre-Construction)2.4 Minimize Landscape Water Demand Energy and Atmosphere
Indoor Environmental Quality 2.3 Insulation; Above Code3 Humidity Control System 6.1 HVAC Meets ENERGY STAR for HVAC
4.1 Outside Air Ventilation; Meets ASHRAE/Std 62.2 10 Renewable Electric Generation System5.1 Local Exhaust; Meets ASHRAE Std 62.2 11 Residential Refrigerant Management6.1 Supply Air Distribution; ACCA Manual D Innovation and Design Process 9.1 Radon Protection; Install System, EPA Zone 1 1.1 Provide Description and Justification9.2 Radon Protection; Install System, Not EPA Zone 1 1.2 Provide Description and Justification
Homeowner Awareness 1.3 Provide Description and Justification1.1 Basic Owner's Manual & Walkthrough 1.4 Provide Description and Justification1.2 Comprehensive Manual & Multiple Walkthroughs
Official Certification (to be Completed After Final LEED for Homes Rating)
Responsible Party Date Printed Name
Project Role / Title Organization / Company
Signature
All declarations and affirmations made in this accountability form are made to USGBC solely for the purpose of assisting USGBC in determining whether LEED Certification is merited. No such declaration or affirmation can be construed as a warranty or guarantee of the performance of the building.
By affixing my signature below, the undersigned does hereby declare and affirm to the USGBC that the LEED for Homes requirements, as specified in the LEED for Homes Rating System, have been met for the indicated credits and will, if audited, provide the necessary supporting documents (drawings, calculations, etc.).
Overall Performance Data
This form is to be completed by the person / organization responsible for the design and/or implementation of one or more of the LEED for Homes credits below. A separate form shall be completed by each design professional responsible for one or more credits.
Areas of Accountability
Accountability Form
(Version 1.7, August 12, 2005)
Step 1. Review the requirements for the credits in the LEED for Home Rating system for which you are responsible.
Step 5. Complete the Official Certification section at the bottom of the form.Step 6. Maintain a project documentation file to assist in the event of an audit of your credit(s) or of this project by the USGBC.
Step 4. In the Areas of Accountability section, check boxes to indicate the LEED for Homes credits for which you have the
Step 2. Complete the General Information section of this form.Step 3. Skip the Overall Performance Data section of the form (to be completed by Provider/Rater).
primary design/implementation responsibility.
Accountability Form
Key Lessons Learnedin Pilot
• Importance of Integrated Design Process
• Importance of “Green” Building Science
• Improvements in the Rating System
Importance of Integrated Design Process
#1: Project Goals
#2: Project Team
#3: Integrated Design
#4: Quality Assurance Procedures
#1: Project Performance Goals
Simple
Compelling
Shared (Included in Specifications)
Measurable (Inspected / Tested)
Contractually Tied to Payment
#2: Project Team
A Clear, Singular Vision
Identify Challenges
Find Appropriate Expertise
Regular Meetings
Everyone Must Be On-Board No Whiners!
design team
3rd party verifier(field inspectors)
Integrated Team
contractors
Consultants(design reviewers)
#3: Integrated DesignAre Goals Clear?
Include key contractors in process early
Is the team communicating effectively?
What systems interact? What Challenges Need to be Addressed?
Review design and changes (against goals and priorities)
Design Costs
Perf
orm
ance
Con
stru
ctio
n co
st
IEQMoisture
Energy
Integrated Design ExampleEnergy Efficient Home
Local exhaust,And humidity control
Combustion venting / safety,
and radon
Energy efficient envelope and HVAC systems
Build tight,ventilate right, and heat recovery
Exterior water management
Vented crawlspaces,conditioned attics, and interstitial water management
Benefits:HealthyComfortDurable
Energy Efficient
IEQWater
Materials
Energy
Site
Efficient fireplace
Low VOC Materials
Design smaller home size
Integrated Design Example:Green Products and Practices
Landscaping andrainwater harvesting
Benefits:HealthyComfortDurable
Energy EfficientEnv. Responsible
Low flow faucets,showers and toilets
Recycled, salvaged,and locally sourced products; Reduced construction waste
Select compact, infill site close to community resources
ENERGY STAR windows, appliances and lighting
Efficient hot water distribution system Central vacuum and
Improved air filters
#4: Quality Assurance Process
• Clearly communicate standards and expectations
• Show trades what is wanted
• Ask for input on better approaches
• Check and stop work/correct early
• Verify and recognize success
• Avoid end-of-pipe quality control
Early Design
Detailed Design
Construction Specifications
& Drawings
Construction
Quality Assurance?
Scopes of Work
Trade Sign-O
ff
Supervisor Sign-Off
Project Team
Project Goals
Team Meetings
Design R
eviews
Design ReviewsSystems
Integration
3rd Party V
erification
Show G
reen Measures
No Credits, Just Prerequisites!
Site Selection
Energy
Materials
Materials
Materials
Water
Indoor Environmental Quality
Beauty & Inspiration