Katie is a thriver, not a survivor, and her comfort depends on temperature control. TJ didn't think this topic could fill 30 minutes. He was wrong. They cover the building envelope, the difference between Tyvek and Zip, why your insulation matters more than your thermostat, and how mini splits work for additions. Katie shares her personal temperature control toolkit, TJ reveals his prototype invention for cooling hot ears, and it turns out it already exists on Amazon. Eight Sleep, if you're listening, send two.