LEED for Homes Rating System

Transcription

1 LEED for Homes Rating System market rate affordable multi-family

2 TARGET MARKET REGULATIONS typical building practices 70% The top 25% of new homes based on performance and environmental responsibility Mainstream production and custom builders MARKET SHIFT lawbreakers innovators market leaders & risk takers 20% 5% DEGREE OF GREEN 5%

3 LEED for Homes categories Design and construction practices that meet specified standards reducing the negative impact of buildings on their occupants and on the environment. indoor environmental quality (IEQ) materials and resources (MR) innovation and design (ID) sustainable sites (SS) location and linkages (LL) awareness and education (AE) water efficiency (WE) energy and atmosphere (EA)

4 Rating System

5 LEED for Homes Project Checklist or Scorecard

6 LEED for Homes Project Checklist or Scorecard

7 How the Credit Structure Works Credit #2: Landscaping Intent Design and install landscape features that minimize demand for water and synthetic chemicals Requirements Mandatory Measures 2.1 Optional Measures Verification / Submittals Synergies and Tradeoffs Additional Information The What The Review The Why

8 LEED for Homes

9 Size Matters

10 LEED for Homes Size Adjuster

11 LEED for Homes Size Adjuster

12 Discussion of Credits Innovation and Design Locations & Linkages Sustainable Sites Water Efficiency Energy and Atmosphere Material & Resources Indoor Environmental Quality Awareness and Education

13 ID Credits Overview Four prerequisite measures 9 points possible Special Features To be used for innovative approaches to: Exceed existing credits Adopt new strategies / technologies not included in the rating system Special process for verification (same as CIRs) USGBC will maintain a database of ID credits

14 LEED for Homes Innovation & Design ID2.1

15 LL Credits Overview Parallel paths Credit 1 (On-Hold), OR Credit 2 thru 6 No prerequisite measures 10 points possible Special Features LL 3 Protect against sprawl LL 5 Minimize transportation needs

16 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

17 SS Credits Overview 2 prerequisite measures 21 points possible 5 points required Special Features Compact development recognized and awarded SS 2 Landscaping SS 4 Surface water management

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21 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

22 WE Credits Overview No prerequisite measure 15 points possible 3 points required Special Features WE 1 Rainwater & grey water systems WE 2 High efficiency irrigation systems WE 3 Indoor uses (lavatory, showers, toilets)

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28 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 Source: WSSD

29 EA Credits Overview Parallel paths Credit 1 OR Credit 2 thru 10 (except 7.1) 6 prerequisite measures 38 points possible Special Features EA 1 Baseline of ENERGY STAR labeled home EA 2 Pre-drywall inspection required EA 8 ENERGY STAR Advanced Lighting Package (ALP) EA 9 ENERGY STAR labeled appliances EA10 Renewable electric generation EA 11 Residential refrigerant management

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41 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.

42 MR Credits Overview 3 prerequisite measures 14 points possible 2 points required Special Features MR 1 Material efficient framing MR 2 Environmentally Preferable Products (EPPs) MR 3 Construction waste

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45 LEED for Homes Environmentally Preferable Products MR2.2

46 Delivery or Disposal?

47 Indoor Environmental Quality (IEQ) In the U.S., the number of asthma sufferers grew by 75 percent between 1980 and Source: Grist Magazine

48 Indoor Environmental Quality Overview Parallel paths Credit 1 OR Credit 2 thru 10 7 prerequisite measures 20 points possible Special Features IEQ 2 Combustion venting IEQ 4 Outdoor air ventilation IEQ 5 Local exhaust IEQ 7 Supply air filtration IEQ 8 Contaminant control IEQ 10 Garage pollution protection

49 Ventilation: 15 CFM per person 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

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53 Awareness and Education (AE)

54 AE Credits Overview 1 mandatory measure 1 point possible Special Features HA 1.1 Owner s manual & walkthrough HA 1.2 Same + 3 hours training

55 Verification Process

56 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.

57 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.

58 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

59 Verification Process (cont d) List of Special Measures Resp. Performance Level Category Credit Mandatory Optional Performance Testing Energy 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 Inspections Energy 2.1 / 2.2 Insulation Raater Materials 4.2 Durability Rater Education Homowner Basic Walkthrough / Training Builder Awareness Comprehensive Walkthrough / Training Builder

60 Accountability Form Accountability Form (Version 1.7, August 12, 2005) 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. Instructions 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. Step 1. Review the requirements for the credits in the LEED for Home Rating system for which you are responsible. 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). Step 4. In the Areas of Accountability section, check boxes to indicate the LEED for Homes credits for which you have the primary design/implementation responsibility. 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. General Information Overall Performance Data Areas of Accountability Builder Name: Subdivision Name: House Address: Provider's Name: Rater's Name: Sampling Protocol Used: (Y / N) LEED Score: / 100 Points LEED Rating Achieved: HERS Score Achieved: / 100 Points (Certified, Silver, Gold, Platinum) Location & Linkages Water Efficiency 2 Site Selection 1.1 Water Reuse; Rainwater Harvesting 5.1 Average Housing Density >/= 7 Units / Acre 1.2 Water Reuse; Grey Water Reuse 5.2 Average Housing Density >/= 10 Units / Acre 2.2 Irrigation System; High Efficiency Measures 5.3 Average Housing Density >/= 20 Units / Acre Materials and Resources Sustainable Sites 1 Smaller Home 2.1 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 Code 3 Humidity Control System 6.1 HVAC Meets ENERGY STAR for HVAC 4.1 Outside Air Ventilation; Meets ASHRAE/Std Renewable Electric Generation System 5.1 Local Exhaust; Meets ASHRAE Std Residential Refrigerant Management 6.1 Supply Air Distribution; ACCA Manual D Innovation and Design Process 9.1 Radon Protection; Install System, EPA Zone Provide Description and Justification 9.2 Radon Protection; Install System, Not EPA Zone Provide Description and Justification Homeowner Awareness 1.3 Provide Description and Justification 1.1 Basic Owner's Manual & Walkthrough 1.4 Provide Description and Justification 1.2 Comprehensive Manual & Multiple Walkthroughs Official Certification (to be Completed After Final LEED for Homes Rating) 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.). Responsible Party Date Printed Name Project Role / Title Organization / Company Signature

61 Key Lessons Learned in Pilot Importance of Integrated Design Process Importance of Green Building Science Improvements in the Rating System

62 Importance of Integrated Design Process #1: Project Goals #2: Project Team #3: Integrated Design #4: Quality Assurance Procedures

63 #1: Project Performance Goals Simple Compelling Shared (Included in Specifications) Measurable (Inspected / Tested) Contractually Tied to Payment

64 #2: Project Team A Clear, Singular Vision Identify Challenges Find Appropriate Expertise Regular Meetings Everyone Must Be On-Board No Whiners!

65 Integrated Team design team contractors Consultants (design reviewers) 3 rd party verifier (field inspectors)

66 #3: Integrated Design Are 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) Construction cost Design Costs Performance

67 Integrated Design Example Energy Efficient Home Vented crawlspaces, conditioned attics, and interstitial water management Exterior water management Energy efficient envelope and HVAC systems Moisture Energy IEQ Build tight, ventilate right, and heat recovery Benefits: Healthy Comfort Durable Energy Efficient Local exhaust, And humidity control Combustion venting / safety, and radon

68 Integrated Design Example: Green Products and Practices Efficient hot water distribution system ENERGY STAR windows, appliances and lighting Energy Efficient fireplace Central vacuum and Improved air filters Low flow faucets, showers and toilets Landscaping and rainwater harvesting Water Site Materials IEQ Benefits: Healthy Comfort Durable Energy Efficient Env. Responsible Low VOC Materials Select compact, infill site close to community resources Design smaller home size Recycled, salvaged, and locally sourced products; Reduced construction waste

69 #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

70 Quality Assurance? Team Meetings Construction Construction Specifications & Drawings Detailed Design 3 rd Party Verification Supervisor Sign-Off Trade Sign-Off Scopes of Work Show Green Measures Design Reviews Systems Integration Early Design Design Reviews Project Team Project Goals

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77 No Credits, Just Prerequisites!

78 Site Selection

79 Energy

80 Materials

81 Materials

82 Materials

83 Water

84 Indoor Environmental Quality

85 Beauty & Inspiration