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Sustainability Advisory Board Agenda <br />July 20, 2022 <br />• Climate change is here, happening now in Colorado and in Louisville. <br />• Local leaders have an opportunity to act and make changes in the building <br />space. <br />Current Green Building Efforts <br />• Adoption of 2021 IECC <br />• Appendix RC = Zero energy appendix applying to single family home. <br />• (see slide Current Code for New Construction for list of current code <br />elements) <br />• Electric -readiness: a home needs pre -wiring and panel capacity to support <br />all -electric equipment installations in the future. <br />Next Phase of Energy Code Update <br />• Considerations include higher efficiency, net zero, and/or all -electric new <br />construction options. <br />• (see slides for definitions) <br />3 pillars of sustainability <br />• Economic, social, environmental <br />• Want to ensure these recommendations strike a balance between all three <br />pillars. <br />Modeling to Inform Policy <br />• To ensure these policies are based on data and reality, we conducted <br />modeling with G14. <br />• Goal was to understand upfront and annual costs of various HVAC systems, <br />and evaluate greenhouse gas emissions. <br />• Each building modeled was modeled to meet current Louisville code. <br />• Other community policies currently in place were researched to inform the <br />modeling. <br />• None of this is set in stone. There could be a mix and match. <br />Policy Consideration 1 <br />• Current Louisville code <br />o 1 a) The 2024 codes are currently being drafted. One proposal in <br />2024 code is to require buildings to install 0.75 W/sf for the largest 3 <br />floors. <br />0 1 b) max out the roof space with PV <br />0 1 c) Provide enough PV to offset any carbon emissions from natural <br />gas used onsite. <br />• PV Required to match 2024 proposal: <br />o Size and cost outlined in table for buildings modeled. <br />• PV that fits on the roof: <br />3 <br />