In space applications, state-of-the-art heat exchangers , with top performance for their entire lifetime, minimizing the risk, are to be designed under strict size and weight constraints. Here a compact heat exchanger, designed with gyroids, an innovative Triply periodical minimal surface (TPMS) topology, is considered. This family of compact heat exchangers represents a major step forward in thermal management, thanks to their small footprint and the high heat transfer performance they can achieve. Due to their peculiar internal structure, they cannot be produced using traditional technologies but they must rely on Additive Manufacturing technique, an exponentially growing technology in recent years but at the same time immature in terms of achieving the 'state of the art'.