Green Builder Coalition September 28, 2015

Transcription

1 Going Beyond Energy with WERS The Water Efficiency Rating Score Green Builder Coalition

2 Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. GreenBuilder Coalition

3 Participants will be able to: Course Objectives Go beyond considering only energy and support the importance of water conservation, even in "water rich" states. Identify key measurable interior and exterior building elements that affect energy and water use. Estimate the measurable results of water consuming interior and exterior building elements using predictive and performance based modeling. Recognize region appropriate energy and water conservation strategies through the presentation of the results of a specific case study. Help convey the benefit of performance based water conservation to state and/or local jurisdictions/communities, and/or elected officials, in adopting water conservation measures. 3

4 The Green Builder Coalition National, non-profit membership organization for green building professionals Founded in 2010 Offers information, technical assistance and advocacy services 4

5 Introduction to the WERS What is the WERS? Why is it Necessary? Projections Benefits

6 What is the Water Efficiency Rating Score? New/Existing Score = 0 to 100 WERS = 70 WERS = 50 3rd Party 6

7 Why is the WERS Necessary? Measurement and incentives increase participation in conservation efforts 5

8 Domestic Water Use Projections 8

9 Total Withdrawals 9

10 Withdrawals Surface and Ground 10

11 Irrigation Withdrawals 52% of total irrigated acreage: California Nebraska Texas Idaho Arkansas 11

12 Stormwater Challenges Infrastructure Requirement Costs Too High East of the Mississippi Water Quality of Surface Water Runoff West of the Mississippi Importing Water Onto A Property is Expensive; Using Potable Water for Landscaping is Becoming Socially Unacceptable Building Elaborate Systems to Transport Water is An Inherently Wasteful Use of Energy and Money Combined Storm & Sewer Systems Can Overflow in Extreme Events 12

13 What Are the Benefits of using the WERS? Potential financial incentives Reduced storm water impact fees Reduced tap fees Potential tax credits Support of codes, regulations, and enforcement Senate Bill 279 in NM was approved and will be funded in 2016 Can be easily incorporated into existing Santa Fe Residential Green Building Code (SFRGBC) Long term conservation of a precious resource we all need 13

14 How is the WERS Different from Other Programs EPA WaterSense Points for indoor fixtures go toward green certifications like SFRGBC, LEED, and NGBS Only measures portion of outdoor water metrics The HERS Index Ensures that home energy efficiency and indoor air quality metrics meet code and local requirements Does not measure water usage Extensive training and certification is required to use the tool Building Performance Institute Does not measure water usage Extensive training and certification is required to use the tool The WERS tool can be used to generate a predictive modeling estimate of water usage and stormwater management for new and existing homes! 14

15 WERS Pilot Projects Map of Test Sites The Double Zero Home Water Use Analysis

16 Where is the WERS Being Piloted? 16

17 Project Information Inputs User to complete the information in the white boxes. Orange boxes are pulldowns that require a response. Purple boxes are informational and grey boxes need no action. Cells with a small red triangle have additional guidance provided in a "fly-out" box. 17

18 Indoor Design Inputs 18

19 Capture & Usage Declaration Program needs to be told the sources of water capture. Rainwater available is determined by the percent of roof and / or directed impervious surfaces. Greywater available is determined by the information provided on the Indoor Use tab in conjunction with the selected fixtures from which it will be collected. 19

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21 Capture & Usage Declaration Program needs to be told where the captured water will be used. Unless a state or municipality allows combined rainwater and greywater, both are considered separately. Depending on the collection and usage, storage tanks are automatically sized. 21

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25 Indoor Design Inputs 25

26 Exterior ETo and Rainfall data 26

27 Exterior Design Inputs 27

28 Exterior Design Summary 28

29 WERS Summary 29

30 Next Steps Continuing Development Partnerships

31 Continuing Development of the WERS Pilot Projects Develop Curricula Train Raters 31

32 Partnerships and Manufacturer s Rebates 32

33 Questions

34 Contact Us for More Info Laureen Blissard, AIA, LEED for Homes Green Rater, HERS Rater Green Builder Coalition Robert Kreger, AIA Green Builder Coalition Thank you!