Source: NIST, 2/26/25
Hidden in the walls of our homes, in the sides of our coffee cups, and even in the International Space Station, wherever humans go, we take some form of insulation with us to keep us at just the right temperature. But just because the idea is old doesn’t mean that there haven’t been innovations. Over the past few years, an entirely new category of insulation has made its way to the market. It’s called “phase change materials” (PCMs), and they control the temperature inside a room by melting and freezing over the course of a day.