A look inside our gyroid heat exchanger during testing. This is liquid butane immediately after the vapor‑to‑liquid phase change while we were pushing a heavy load of vapor through the top of the unit. The gyroid core drives high turbulence and extremely high surface‑area contact, which forces rapid condensation and efficient heat transfer. Those visible streaks are the condensed butane being pulled through the chaotic flow paths created by the gyroid geometry. All of this is happening inside a