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Sustainability Advisory Board <br />Minutes <br />August 16, 2023 <br />Page 5 of 6 <br />Todd next discussed electric water heaters. He directed the Board to his <br />handout. John inquired about the issue of recovery time for electrical resistance <br />water heaters. Todd then discussed EV charging. He directed the Board to his <br />handout. <br />Todd finally discussed electric heat pumps. He directed the Board to his handout. <br />Tiffany asked about the reasons for making and selling heat pumps with lower <br />HSPF ratings; Todd replied that such heat pumps are appropriate for milder <br />climates and noted that Xcel's heat pump rebates are tailored to Colorado's <br />climate. <br />Public Comment <br />RJ Harrington: RJ explained that his family electrified its home in 2009 with a <br />ground source heat pump. He did not recommend ground source heat pumps for <br />other Louisville residents owing to the presence of coal mine chambers and <br />shafts lurking below the ground's surface. <br />LSAB Discussion <br />Josh inquired about the impacts of the locations of existing duct vents on heating <br />and cooling with the same heat pump <br />Tiffany suggested that Todd's presentation become some sort of service that the <br />Board offers since Todd is so good at conveying the relevant information. Todd <br />suggested that the Board could organize neighborhood workshops. Tiff endorsed <br />this idea. <br />John wondered if there is a resource to be tapped in those Louisville residents <br />rebuilding from the Marshall fire, especially to the 2021 IECC (or stricter) building <br />codes, as these residents are installing electric appliances. Todd pointed out that <br />those rebuilding are planning for electrification from the beginning but that most <br />