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Building Energy Codes 2024 Update International Energy Conservation Code (IECC) July 23, 2024 © 2020 Austin Energy Speakers Patricia Chawla Mark Leger Energy Efficiency Services Manager Green Building and Emerging Tech Austin Energy Engineer Green Building and Emerging Tech Austin Energy 2 Agenda Introduction Significant Changes New Appendices Outreach, Feedback and Impacts Next Steps and Q&A 3 Codes | Ordinances | Standards | Initiatives City Initiatives, Climate Protection Plan & Austin Energy Goals 800 MW Conservation Goal with • 100 MW of DR Zero Waste Plan Zoning Overlays • • • PUD Agreements • Watershed Protection • • SMART Housing Imagine Austin • Water Conservation • Vision Zero • • • • 950 MW Solar Goal with 110 MW of Local Solar 55% Renewables Goal 10 MW Storage Goal 20% Emissions Reduction 4 Where to find? • PDF (redlined) version available for purchase at shop.iccsafe.org/2024-international-energy- conservation-coder.html • Free digital access version expected mid-July at codes.iccsafe.org/codes/i-codes/2024-icodes • Print and PDF (non-redline) versions expected mid-July at shop.iccsafe.org/2024-international- energy-conservation-coder.html • Proposed local amendments at publicinput.com/g4245 5 Significant 2024 Residential IECC Changes Model and Local 6 Significant Changes – Residential • • • • • Conversion of the current Additional Energy Efficiency requirement into a point system with envelope, mechanical, demand response and onsite solar options for prescriptive path users. Modeling path users to demonstrate up to 20% energy savings. Demand response controls must be included on electric water heaters (currently allowed in Austin Energy Code). Bathrooms with intermittent exhaust fans must include controls to help remove excess moisture. Can include timers, occupant sensors, humidity control or contaminant control (similar to requirement in AEGB program). Air leakage target reduction from 5 ACH50 to 4 ACH50 for this climate zone. Prescriptive attic insulation requirement decreased from R49 to R38. 7 Proposed Local Amendments – Residential • • • • • Retained existing amendments where more stringent than model code Deleted amendments where now incorporated in model code or no longer needed • Footnote c to Table R402.1.3(1) & (2); R402.7 Attic Ventilation; R406.2 ERI Compliance; R406.3.2 On-site renewables are included, R406.4 Energy Rating Index, Table R406.5 Maximum Ene4rgy Rating index Deleted ‘R403.5.4 Demand Response of Electric Resistance Water Heating’ and Adopted Appendix RJ Demand Responsive Controls • Added exception for timers until DR program for water heating is developed Adopted Appendices for Electric Vehicle (Appendix RE) and Electric Readiness (Appendix RK) • Added RK101.1.5 Water Heater Space Added wall space requirement to Ch 7 [RE] Residential Solar Ready in coordination with AE Solar team 8 Significant 2024 Commercial IECC Changes Model and Local 9 Significant Changes - Commercial • Air Leakage • Documentation/inspection option removed for Group R and I • Stringency increase from 0.4 cfm/ft2 to 0.35 cfm/ft2 and from 0.3 cfm/ft2 to 0.27 cfm/ft2 for Group R and I • Updates to HVAC Efficiency tables • Align with ASHRAE standard 90.1 2022 and federal standards • Increases in efficiency levels • Total System Performance Ratio (TSPR) allows for trade-offs within HVAC system design (C409) • Updates to Additional Efficiency section C406 that provide additional credit paths that to align with ASHRAE standard 90.1 2022 10 Proposed Local Amendments - Commercial • • • • Retained existing amendments where more stringent than model code Deleted amendments where now incorporated in model code • C403.15 Demand response, C404.10 Electric water heater timers, and C405.2 Lighting controls now all considered under Appendix CI – Demand Responsive Controls Adopted items from optional appendices with additional local amendments • Appendix CG – Electric Vehicle Charging Infrastructure • Appendix CH – Electric-Ready Commercial Building Provisions • Appendix CI – Demand Responsive Controls, with exceptions for special occupancies • Appendix CJ – Electrical Energy Storage System Introduced new local amendments, including amendment to 4.2.1.1 that allows carbon emissions as the compliance metric rather than energy cost when using performance pathway 11 New Appendices Model and Local 12 ESS and Renewable Energy Commercial Only • Prescriptive requirements for renewable energy systems were introduced • Provide system with 0.75 W/ft2 based on the combined gross conditioned floor area of the three largest floors • Provisions for off-site renewables and procurement are given, including RECs and green retail tariff • Requirements to either provide an Energy Storage System (ESS) or to have a space that is ESS ready were moved to optional Appendix CJ by the ICC board • Worked with solar team to determine whether to adjust renewable energy systems and/or adopt ESS requirements 13 Demand Response Residential – Appendix RJ DR controls required on electric storage water heaters • Timer allowed in exceptions Demand responsive thermostat option in R408 Coordinated with AE DR team for their recommendations • • • Commercial – Appendix CI DR requirements were included in the COA energy code through amendments DR provisions are now included in the 2024 IECC, though they have been moved to optional appendices Coordinated with AE DR team for their recommendations • • • 14 Electric Vehicle Readiness Residential – Appendix RE • One- and two-family dwellings and townhouses = one EV-capable, EV-ready or EVSE per dwelling unit • R-2 occupancies = EV-capable, EV-ready or EVSE space for 40% of dwelling units or automobile parking spaces, whichever is less Commercial – Appendix CG EV-capable and EV-ready quantities required determined by building occupancy type(s) OCCUPANCY Group A Group B Group E Group F Group H Group I Group M Group R-1 Group R-2 Group R-3 and R-4 Group S exclusive of parking garages Group S-2 parking garages Commercial Required EV Power Transfer Infrastructure EV READY SPACES 0% 0% 0% 0% 0% 0% 0% 5% 5% 0% 0% 0% Definitions EV-Capable - Capacity and conduit EV-Ready - Capacity, conduit, wiring and outlet EVSE - Capacity, conduit, wiring and charging station EV CAPABLE SPACES 10% 30% 30% 5% 0% 30% 30% 35% 35% 5% 0% 30% 15 Electric Readiness Residential – Appendix RK • Capacity to be included in load calculations Commercial – Appendix CH • Combustion space heating • Dedicated branch circuit outlets shall be installed and terminate within three feet of and with a rating not less than • Combustion service water heating • Combustion cooking/clothes drying • Cooking appliances: 240-volts, 40-amps • Clothes dryers: 240-volts, 30-amps • Hydronic systems • Water heaters: either 240-volts, 30-amps or 120V, 20-amps • Reserved space for future electric equipment • Exceptions allowed for equipment not installed or • Dedicated branch circuits serving multiple dwelling units 16 Outreach and Feedback 17 Outreach Who did we engage? • A diverse set of stakeholder groups were selected and included internal city staff from various departments, contractors, custom builders, production builders, multifamily builder, Home Builder’s Association, architects, affordable developer, energy code testers/HERS rater, commissioning agents, engineering firms, HVAC contractor, manufacturer, academia, and interest groups such as Texas Gas, AIA, SPEER, and local activists. • The 2024 stakeholder list was based on the 2021 stakeholder list and an Office of Sustainability Grant Community Coordination stakeholder list, then updated to include a current, more diverse set of stakeholders. • An estimated 157 organizations with 235 stakeholders were included. 18 Outreach Speak Up Austin How did we communicate? • • Announcements at AEGB seminar Presentations • Social Media • Emails • • Newsletters How many did we engage? • Speak Up Austin • Main page = 1166 views • COM = 210 views • RES = 173 views • RES + COM = 55 comments • Newsletters, Social Media, Emails • 8 DSD newsletter listings • 4721 average stakeholders contacted • 2235 average views Presentations = 235 participants Total engagements = 297 participants • • 19 Stakeholder Feedback Topics 40 35 30 25 20 15 10 5 0 Residential Commercial 20 Projected Code Impacts 21 Projected Energy Savings Over 2021 COA Energy Code Residential Energy Code Projected Savings by Sector Residential 7,200 MWh | 7.8% Commercial 15,400 MWh | 11.6% Based on FY2023 building permits Includes transmission & distribution factor 10% 5% 0% Single Family Affordable Home Single Family Standard Home Multifamily ≤4 Stories 22 Projected Energy Savings Over 2021 COA Energy Code Commercial Energy Code 40% 35% 30% 25% 20% 15% 10% 5% 0% Multifamily 5 - 9 Stories Multifamily ≥10 Stories Small Office Medium Office Large Office Retail Strip Mall Retail Stand Alone Restaurant Sit Down Restaurant Fast Food Small Hotel Large Hotel Primary School Secondary School Hospital Warehouse Outpatient Healthcare % Site Energy Savings from EEM % Site Energy Savings from PV 23 Next Steps 24 Schedule Board & Commission Presentations  4/16 RMC  7/11 Building & Fire Board • 7/23 Mechanical & Plumbing Board • 8/12 EUC • 8/20 RMC City Council • 10/10 Set Hearing • 10/24 Conduct Hearing Implementation • 3/1/25 Code becomes effective for new permit applications 25