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California Energy Policy: Zero Net Energy Homes in 2020

California Energy Policy: Zero Net Energy Homes in 2020. Martha Brook, P.E. High Performance Buildings and Standards Development Office California Energy Commission June 28, 2011. Presentation Overview. CA ZNE Policies ZNE Definition ZNE Standards Existing Buildings.

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California Energy Policy: Zero Net Energy Homes in 2020

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  1. California Energy Policy:Zero Net Energy Homes in 2020 Martha Brook, P.E. High Performance Buildings and Standards Development Office California Energy Commission June 28, 2011

  2. Presentation Overview • CA ZNE Policies • ZNE Definition • ZNE Standards • Existing Buildings

  3. AB 32: CA Global Warming Solutions Act (2006) • Reduce to 1990 levels by 2020 • Reduce to 80% below 1990 levels by 2050

  4. Importance of Building Sector in GHG solutions 70% of this is residential & commercial bldgs.

  5. Why ZNE? A paradigm shift is needed.

  6. CA ZNE Policies • ZNE new homes by 2020 • ZNE new commercial buildings by 2030 • Reduce consumption by 40% in existing homes by 2020 • 50% of existing commercial buildings will be ZNE by 2030

  7. ZNE Definition The societal value of energy consumed by the building over the course of a typical year is less than or equal to the societal value of the on-site renewable energy generated.

  8. ZNE Definition For a house, ZNE is achieved by a CA Whole House Home Energy Rating (HERS) of zero (or less)

  9. 0 ___________ ENERGY BUDGET ZNE Standards

  10. DRAFT ZNE Standards • 2013 Update (under development) • More insulation (+ R4 on walls and roof deck) • Better windows (U=0.32, SHGC=0.25) • Reduce infiltration with air sealing (4 ACH50) • Ventilative cooling (e.g. Whole House Fans) • Communicating T-stat • Reduce wasted hot water through better plumbing design • Stricter high efficacy lighting & vacancy sensor reqs. • Limited ability to use PVs for code compliance • Prescriptive levels of efficiency must be met first • Examples: • Large house size – energy budget cap @ 2500 sf. • Window orientation

  11. DRAFT ZNE Standards • 2017 Update • Increase envelope R-values • Thermal mass requirements • Further reduce wasted hot water (e.g. designed plumbing systems) • More high efficacy lighting • Heating/Cooling fault detection reporting via communicating T-stats • More options to use PV for code compliance • Third-party performance verification (HERS rating)

  12. DRAFT ZNE Standards • 2020 Update • Reduce infiltration (1 ACH50) • Thermal mass & solar targeting reqs. (e.g. “passive design”) • All high efficacy lighting • High efficiency HVAC (e.g. ductless heating & cooling systems) • Central core water heating design with waste recovery • Solar thermal requirements • High efficiency appliances • Plug load management / home automation system • PV requirements • Cool pavements

  13. “Reach” Standards for Title 24 • Voluntary Standard for additional energy efficiency & on-site renewable energy generation – written in code language • Similar approach as mandatory Title 24 • Mandatory & prescriptive measures • Energy performance budgets based on building type and climate zone • Advanced Standard will become: • New Construction targets for CA utility incentive programs • Future versions of Energy Chapter in Green Building Standard • Energy basis of green building codes adopted by local agencies • Advanced Standard will provide: • List of measures that need field performance, market acceptance studies by PIER, IOU Emerging Technology & CASE programs • List of measures for migration to mandatory Standards

  14. ZNE Existing Buildings ZNE & Existing Buildings

  15. ZNE & Existing Buildings • ZNE Standards will be influenced from what works in existing buildings • Case studies of field performance and market acceptance occur in existing bldgs. • ZNE Standards will impact EE in existing buildings • Standards tends to “mainstream” technologies, which lowers costs for retrofits • Utilities look to technologies in Standards for measures to incent in existing bldgs. • Many ZNE Standards will apply to additions & alterations

  16. ZNE & Existing Buildings

  17. AB 758 (2009) A Comprehensive Program to Improve the Efficiency of Existing Buildings

  18. AB 758 Mandate • Calls for a comprehensive program to achieve energy savings in CA’s existing building stock • Calls for a complimentary portfolio of techniques, applications, and practices to improve the efficiency of buildings that fall significantly below current California Building Energy Efficiency Standards • Calls for CEC to develop and implement program in collaboration with all stakeholders

  19. AB 758 Elements • Public Awareness Campaign • Workforce Development • Financing Options • Energy Performance Rating Systems • Energy Performance Disclosures • Efficiency Recommendations • Efficiency Improvements

  20. Isn’t CA already doing this? • IOU 2010-2012 energy efficiency programs for existing buildings ~ $2.5 B • California Building Energy Efficiency Standards applies to additions & alterations of existing buildings • California Long Term Energy Efficiency Strategic Plan (CPUC, 2008) • CA’s American Recovery and Reinvestment Act (ARRA) funding ~ $740 M building efficiency upgrades

  21. What’s new with AB 758? • CEC given the authority to develop, adopt & implement regulations • Potential Rating Requirements • Potential Improvement Requirements • Long term, statewide program • CEC using ARRA SEP programs to pilot key components of AB 758: • Increase Public Awareness • Pursue Financing Solutions • Pilot Rating Programs • Build Workforce

  22. AB 758 Timeline • ARRA SEP Pilots • Current voluntary energy efficiency programs • AB 1103: Commercial building energy use disclosure regulations • Commercial building asset rating system development • Update HERS II if needed, based on pilot programs • Phase 1: Infrastructure Development (2010 & 2011)

  23. AB 758 Timeline • Phase 2: Ratings & Disclosures (2012 & 2013) • Rulemaking(s) for rating disclosure regulations • Develop recommendations for mandatory improvements • Phase 3: Efficiency Improvements (2014 & …) • Rulemaking(s) for efficiency improvement regulations

  24. Achieving AB32 goals… Residential Sector Example

  25. Energy Conservation “You can never get enough of what you don’t really need” • Conservation Ethic • Social Marketing • Education & Outreach • Facilitate with technology innovation & behavioral research • Feedback devices • Carbon calculators & games • Reward Conservation Heroes

  26. Revisiting AB32 goals… Residential Sector Example

  27. Zero Net Energy Homes in CA

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