While municipal carbon deduction goals are forcing more widespread adoption of net-zero buildings, especially commercial real estate in the United States, there's a surprising early adopter for this ultra-green construction: affordable housing builders. In this episode of the AEC Podcast, we talk to Lois Arena, senior mechanical engineer with Steven Winters Associates and internationally-recognized passive house expert, who says she's seeing multi-family affordable housing emerge as a market leader in net-zero building construction. "They own their building for the life of the building so the financial incentive really makes sense for them," Arena says.