Buildings and California s Water-Energy Nexus

Transcription

1 Buildings and California s Water-Energy Nexus Green California Summit 2015 Wes Sullens

2 Introduction Research and Findings Session Outline Getting from Here to There: Policy, LEED v4 & Beyond The Report & other Research

3 INTRODUCTION

4 RESEARCH AND FINDINGS

5 Methodology 1,363 California LEED BD+C projects Study years LEED Rating Systems: LEED CS 2.0 LEED CS 2009 LEED NC 2.1 LEED NC 2.2 LEED NC 2009 LEED Schools 2007 LEED Schools 2009

6 Methodology WEc1.1: Water Efficient Landscaping 50% Reduction WEc1.2: Water Efficient Landscaping no potable water use WEc2: Innovative Wastewater Technologies WEc3.1: [indoor] Water Use Reduction reduce by 20% WEc3.2: [indoor] Water Use Reduction reduce by 30% SSc6.1: Stormwater Design: Quantity Control SSc6.2: Stormwater Design: Quality Control

7 Credit Harmonization WE Credit 3.1 All 20% reduction WE Credit 3.2 All 30% Reduction Includes v2009 (v3) projects for which 20% reduction was a prerequisite Includes projects that achieved at least a 30% reduction

8 General Trends Water Conservation and Management Credit Achievement in California LEED BD+C Buildings Note: Includes all 1,363 buildings in the data set. Does not include low-rise residential buildings. The average project achieved 3.89 of the 7 core water-related credits in LEED BD+C.

9 Highest achievement with [indoor] Water Use Reduction General Trends LEED BD+C Credit Achievement for Water Conservation and Management in California Buildings Next are the Water Efficient Landscaping credits particularly the 50% reduction Stormwater Design - Quality over Quantity Control Wastewater Technologies had lowest achievement Includes all 1,363 buildings in the data set. Does not include low-rise residential buildings.

10 General Trends 1,324 Projects achieved some form of [indoor] Water Use Reduction Percent Indoor Water Use Reduction in California LEED Buildings Most projects opted for at least the 30% reduction V2009 (v3) accounts for just 317 of the buildings in the study More projects achieved the 40% reduction tier than the 20% tier Note: Does not include low-rise residential buildings. Data analyzed from Q 2014.

11 Temporal Trends WEc3.1 achieved by over 90% of projects LEED BD+C Credit Achievement Trends for Water- Related Credits earned by California Projects Certified WEc3.2 improves from 75% to over 90% WEc1.1 consistently above 80% achievement WEc1.2 lags behind with peak of only 30% in 2009

12 Temporal Trends WEc2 consistently low LEED BD+C Credit Achievement Trends for Water- Related Credits earned by California Projects Certified SSc6.1 Stormwater Quantity Control shows modest, but positive achievement SSc6.2 Stormwater Quality Control shows increased popularity over time

13 National Trends Credit-by-credit, California is closely matched with the national statistics National vs. California LEED Credit Achievement Comparison for Water Conservation and Management Notable differences: WEc % Reduction in Landscape water use SSc6.1 Stormwater Design, Quantity Control

14 Regional Trends 8 CA Water Regions Based on CBSA and Water Resources

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16 Regional Trends Higher energy intensity: State water infrastructure projects Imported water Lower energy intensity: Groundwater Local rivers/streams

17 Regional Trends Average Water Credit Achievement by Water Region

18 Conclusions: LEED BD+C rating systems have recorded thousands of water conservation and management activities Green buildings can do more to conserve, protect and restore water resources The water, climate and energy context demands further consideration New ideas, tools and policies provide framework for progress

19 GETTING FROM HERE TO THERE: POLICY, LEED V4 & BEYOND

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21 Effective since November 2014 FOCUS ON PERFORMANCE

22 More water pre-requisites Points Points LEED BD+C v3 LEED BD+C v4 Water Use Reduction (indoor) required Indoor Water Use Reduction required Outdoor Water Use Reduction required Building-Level Water Metering required Total requirements: Total requirements: 1 3

23 More water points LEED BD+C v3 Points LEED BD+C v4 Points Water Efficient Landscaping 4 Outdoor Water Use Reduction 2 Innovative Wastewater Technologies 2 Water Use Reduction (indoor) 4 Indoor Water Use Reduction 6 Cooling Tower Water Use 2 Water Metering 1 Stormwater: Quantity Control 1 Rainwater Management 3 Stormwater: Quality Control 1 Total points available in LEED v3: 12/110 Total points available in LEED v4: 14/110

24 Innovation = water opportunity LEED BD+C v3 Points LEED BD+C v4 Points Innovation in Design 5 Innovation 5 Water Performance Measurement (1) Sustainable Wastewater Management (1) Whole Building Cooling Tower Water Management (1) LEED v4 Pilot Credit Library ( ) LEED v2009 Pilot Credit Library ( ) Total Innovation points in LEED v3: 5/110 Total Innovation points in LEED v4: 5/110

25 Bonus points for water: Regional Priority LEED BD+C v3 Points LEED BD+C v4 Points Regional Priority 4 Regional Priority 4 CA zone with lowest RP reward for water (2) CA zone with lowest RP reward for water (1) CA zone with highest RP reward for water (3) CA zone with highest RP reward for water (4) Total RP points in LEED v3: 4/110 Total RP points in LEED v4: 4/110 Total RP points available in California: 2-3/110 Total RP points available in California: 1-4/110

26 Regional Priority in LEED v4 Number of water conservation and management credits designated as Regional Priority in LEED v4 Other priorities: Air quality Energy efficiency Development density Heat island For San Francisco: +24% energy efficiency Transit trips/day Building lifecycle impact red. Raw materials sourcing Rainwater mgmt: 85-95% 40% reduction indoor water

27 Maximal water pathway LEED BD+C v3 Points LEED BD+C v4 Points Pre-requisites 1 R Pre-requisites 3 R 5 core water credits 12 5 core water credits 14 Water innovation opportunity 5 Water innovation opportunity 5 Regional Priority opportunity in CA 2-3 Regional Priority opportunity in CA 1-4 Maximal water pathway: / R Maximal water pathway: / R % of total LEED points 17-18% % of total LEED points 18-22% % of minimum certification tier 47-50% % of minimum certification tier 50-60%

28 Conclusions: LEED BD+C rating systems have recorded thousands of water conservation and management activities Green buildings can do more to conserve, protect and restore water resources The water, climate and energy context demands further consideration New ideas, tools and policies provide framework for progress

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30 Download the full report Report available at USGBC website: Or: Blog:

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