4. Presentation on the International Energy Conservation Code (IECC) 2024 — original pdf

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IECC 2024 Update International Energy Conservation Code Heidi Kasper Director, Green Building and Emerging Technologies September 25, 2024 © Austin Energy 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 • Commercial = 210 views • Residential = 173 views • RES + COM = 55 comments • Newsletters, Social Media, Emails • 8 Development Services Dept. newsletters • 4721 average stakeholders contacted • 2235 average views • Presentations = 235 participants • Total engagements = 297 participants 2 Stakeholder Feedback 40 35 30 25 20 15 10 5 0 Residential Commercial 3 Significant Changes – Residential • Additional Energy Efficiency requirement point system • Demand response controls required for electric water heaters • Bathrooms exhaust fans require controls to remove moisture • Air leakage reduction from 5 ACH50 to 4 ACH50 • Prescriptive attic insulation requirement decreased to R38 • Adoption of Electric Ready and EV Appendixes 4 Significant Changes - Commercial • • • • • Renewable energy systems required Energy Storage System Readiness required Air Leakage reduced and testing required for Group R and I • Updates to HVAC Efficiency Tables Total System Performance Ratio (TSPR) allows for trade- offs within HVAC system design (C409) • Updates to Additional Efficiency Section C406 Adoption of Electric Ready, EV ready, and Demand Response appendixes 5 Electric Vehicle Readiness Commercial EV-capable, EV-ready or EVSE required quantities determined by building occupancy type Residential • One and two-family dwellings and townhouses = one EV-capable, EV-ready or EVSE space per dwelling • R-2 occupancies = EV-capable, EV-ready or EVSE space for 40% of dwelling units or car parking spaces, whichever is less Definitions • EV-Capable - Capacity and conduit • EV-Ready - Capacity, conduit, wiring and outlet • EVSE - Capacity, conduit, wiring, charging station 6 Electric Readiness Commercial Residential • Requirements included in Appendix CH • Combustion space heating • Combustion service water heating • Combustion cooking/clothes drying • Reserved space for future electric equipment • Dedicated branch circuits • Capacity to be included in load calculations • Dedicated branch circuit outlets shall be installed and terminate within three feet of and with a rating not less than • Cooking appliances: 240-volts, 40-amps • Clothes dryers: 240-volts, 30-amps • Water heaters: 240-volts, 30-amps or 120V, 20-amps • Exceptions allowed for equipment not installed or serving multiple dwelling units 7 Projected Energy Savings Over 2021 COA Energy Code Savings Percentage by Building Type Projected Savings by Sector • Commercial 18,200 MWh | 13.4% • Residential 5,300 MWh | 6.1% Based on FY2023 building permits Includes transmission & distribution factor Healthcare School Hotel Restaurant Retail Office Multifamily ≥8 Stories Multifamily 5 - 7 Stories Multifamily ≤4 Stories Standard Home Affordable Home 0.0% 5.0% 10.0% 15.0% 20.0% % Site Energy Savings from EEM % Site Energy Savings from PV 8 Affordability Impact Single Family Multifamily • Estimated increase in construction cost • Estimated increase in construction cost • • • • • EV Readiness ~ $125 Electric Readiness ~ *$150 EV Readiness ~ $325 Electric Readiness ~ *$100 Additional Efficiency measures ~ $375 Additional Efficiency measures ~ $350 Reduced Attic Insulation ~ $850 less cost Reduced Attic Insulation ~ $300 less cost TOTAL ~ $200-350 reduced cost TOTAL ~ $375-475 per unit • • • • • • Savings ~ $25-50 per year • Savings ~ $75 per unit per year • Simple Payback ~ 5.5 years *Electric Readiness cost would only affect mixed fuel homes 9 Affordability Impact Commercial • Difficult to estimate given wide diversity of building types and scales • EV readiness and Electric readiness 4-6 times higher costs to retrofit • Prototype 10 story multifamily • • • • • • • Renewable Energy ~ $490 EV Readiness ~ $360 Electric Readiness ~ *$500 Additional measures ~ $400 TOTAL ~ $1250-1750 per unit Savings ~ $160 per unit per year Simple Payback ~ 8-10 years * Electric Readiness costs would only affect mixed fuel buildings 10