Building Energy Efficiency August 24, 2016 Standards Authority - PowerPoint PPT Presentation

CBIA – CEC Building Standards Forum Vision for the 2019 Standards Mazi Shirakh, PE ZNE Technical Lead Building Energy Efficiency August 24, 2016 Standards

Authority & Process Public Resources Code (PRC 25402): Reduction of wasteful, uneconomic, inefficient or unnecessary consumption of energy (a)(1) Prescribe, by regulation, lighting, insulation climate control system, and other building design and construction standards that increase the efficiency in the use of energy and water… Warren Alquist Act Signed into law in 1974 by Governor Ronald Reagan and launched by Governor Jerry Brown in 1975 Title 24 2016 Standards 2

Policy Drivers For Building Standards Governor's “Clean Energy Jobs Plan” Governor Brown’s ZNE goals – focused on ZNE building code requirement by 2020 for newly constructed residential buildings – get there in 3 code cycles (2013, 2016, 2019) Zero Net Energy: Residential by 2020 and Nonresidential by 2030 CARB Climate Change Scoping Plan California Long Term Energy Efficiency Strategic Plan Title 24 2016 Standards 3

2019 Standards: the 2015 IPER Vision A ZNE Design Designation Building is one where the value of the net amount of energy produced by on-site renewable energy resources is equal to the value of the energy consumed annually by the building, at the level of a single “project” seeking development entitlements and building code permits, measured using the California Energy Commission’s Time Dependent Valuation (TDV) metric. A ZNE Design Designation Building meets an Energy Use Intensity (EUI) value designated in the Building Energy Efficiency Standards by building type and climate zone that reflect best practices for highly efficient buildings . Title 24 2016 Standards 4

Life Cycle Costing Standards measures must be cost effective 1. Using Life Cycle Costing Methodology (LCC) i. Discounted cash flows for costs and benefits ii. Accounts for maintenance costs/benefits iii. Appropriate discount rates and life of measures - 30 years for residential measures 15 years for nonresidential measures 2. Time Dependent Valuation (TDV) Value of gas and electricity changes depending on the i. season and the time of day 8,760 TDV multipliers for each hour of the year ii. Title 24 Favors measures that save energy during high demand iii. 2016 Standards periods 5

Zero Net Energy Standards Achieve additional energy savings from building components regulated under Title-24 to reach ZNE goals Integrate onsite generation into building Standards to accomplish ZNE Impacts of Building Standards on Home Energy Use Title 24 2016 Standards 6

California Standards for California Climates Focus on CA Climate Diversity Standards set expectations for climate-specific designs CA weather data captures statewide coincident peak demand climate conditions Coastal - 1, 3, 5, 6, 7, 8 Inland - 2, 4, 9, 10 Central Valley - 11, 12, 13 Desert - 14, 15 Mountains -16 Title 24 2016 Standards 7

2019 Standards – PV Tradeoff 1. The 2016 Standards provided a flexible PV tradeoff credit that was just large enough to trade away the HPA and HPW 2. The credit was provided to allow some builders more time to adopt the HPA and HPW as common building practice 3. The 2013 Standards envelope features became the “baseline” for using the PV credit 4. For the 2019 Standards, the PV tradeoff will no longer be available to trade away the 2016 HPA and HPW Title 24 2016 Standards 8

2016 Residential Standards Approach A whole new approach for Standards development: Not focused on specific measures: instead, staff defined performance targets, 1. such as U-factors, needed to meet the ZNE goals Invited builders, manufacturers, and suppliers to partner with staff to come 2. up with solutions that meet equivalent performance CBIA hosted forums in April and November of 2014 to communicate the ZNE 3. vision and engage industry in creating new solutions – allowing the free market to settle on the most promising solutions Worked with the CPUC and IOUs to provide incentives, education, and 4. outreach supporting the transition of the building industry to the new practices needed for these solutions in advance of the effective date The result was a cooperative and innovative collaboration between staff, builders, manufacturers, and utilities. The industry as a whole rose to the challenge with multiple solutions for both HPAs and HPWs. The 2019 Standards are expected to Title 24 2016 follow the same cooperative approach Standards 9

2016 Standards Range of Options High Performance Attics (HPA) performance defined by: Roof deck insulation equivalent to R-13 insulation below deck and R-38 ceiling insulation. Insulation choices may include spray foam, batt, or blown-in, and SIP panels. However, the builder has many other options, all meeting the HPA performance : 1. R-6 continuous insulation with radiant barrier 2. Hybrid roofing systems combining insulation and higher roof reflectance 3. Ducts in conditioned space (DCS) 4. Ducts in sealed or unvented attics 5. Or other solutions suggested by the industry Title 24 2016 Standards 10

2016 Standards Range of Options Hybrid Roofing Above Deck Insulation Sealed Attic with Blown-in Insulation Ducts in Conditioned Space Title 24 2016 Standards 11

2016 Standards Range of Options High Performance Walls (HPW) – Performance Defined By: R19 cavity + R5 Continuous Insulation – U-Factor (Approx 0.051) However, the builder has many other options, all meeting the HPA performance: 1. 2x4 @ 16” OC, R15 + R-8 CI (0.051) 2. 2x6 @ 24” OC, R19 + R-5 CI (0.049) 3. 2x6 @ 24” OC R21 + R-4 CI (0.048) 4. Staggered studs with batt insulation or spray foam 5. Structurally Insulated Panels (SIPs) 6. Or other solutions suggested by the industry Title 24 2016 Standards 12

2016 Standards Other Measures Instantaneous (Tankless)Water Heaters • Basis of prescriptive and performance approach – set on federal IWH performance, currently at Energy Factor of 0.82 • For tanks less than 55 gallons, allow prescriptive alternative for standard storage water heaters in combination with:  Quality Insulation Installation (QII), with either  Compact pipe distribution design, or  Insulating all half inch and larger hot water pipes  For tanks above 55 gallons, no QII is required, only combine with compact distribution or pipe insulation • Use the performance path for additional options, such as electric heat pump water heaters Title 24 2016 Standards 13

2016 Standards Other Measures High Efficacy Lighting 1. high efficacy high CRI lighting throughout the house, paired with JA8 compatible controls 2. All recessed downlights in ceilings must be high efficacy 3. Allow luminaires with screw base sockets as high efficacy if the socket is populated with a high quality, JA8 compliant lamp at the time of inspection; exception for downlights 2016 lighting improvements resulted in large energy savings, reduction in plug loads and PV size needed to get to ZNE. Title 24 2016 Standards 14

Impact of 2016 Standards on the PV Size To get to ZNE, the 2016 improvements results in a PV system 1. that is 13% smaller in cooling CZs Or about 900 watts smaller 2. Or about 70 square feet smaller foot print for the PV system 3. PV footprint on the roof in extreme CZs will be an issue for the ZNE goal; more efficiency helps to reduce the PV footprint area. Title 24 2016 Standards 15

2019 Standards Process We are very early in the process, the pre-rulemaking is et to begin soon 2019 STANDARDS UPDATE SCHEDULE DATE MILESTONES February 2016-July 2016 Measures Identified and approval August 2016 to June 2017 Stakeholder meeting/workshop & final staff workshop June 1, 2017 CASE Reports submitted to the CEC December 1, 2017 45-day Language Hearings March 1, 2018 Adoption of 2019 Standards at Business Meeting June1, 2018 to Staff work on Software, Compliance Manuals, Electronic November2018 Documents Available to Industry November 1, 2018 Approval of the Manuals January 1, 2019 Software, Compliance Manuals, Electronic Documents Available to Industry January 1, 2020 Effective Date Title 24 2016 Standards 16

2019 Standards Process 1. Update the TDV values to reflect the current NG and Electricity costs 2. Update the Life Cycle Costing (LCC) assumption based on TDV and other parameters 3. Using the updated TDVs, evaluate cost effectiveness of additional envelope measures for the extreme cooling climate zones; possible measures include additional roof deck insulation for high performance attics and improving the wall U-factors 4. Using the updated TDVs, determine the cost effectiveness and size of PV systems for each climate zone. Title 24 2016 Standards 17

Standards Contact Information – Energy Commission Christopher Meyer Mazi Shirakh, PE Manager, Building Standards Office ZNE Lead Christopher.Meyer@energy.ca.gov mshirakh@energy.ca.gov 916-654-3839 916-654-4052 Payam Bozorgchami, PE Project Manager, 2019 Building Standards Payam.Bozorgchami@energy.ca.gov 916-654-4618 Larry Froess, PE CBECC Software Lead Larry.Froess@energy.ca.gov 916-654-4525 Title 24 2016 Standards 18

Questions? Title 24 2016 Standards 19