The windows of Exergyn’s lab sit high above the floor—by design. Hidden within a discreet corner of DCU Alpha’s innovation campus in north Dublin, Exergyn is quietly developing a technology that could significantly reduce global greenhouse gas emissions. From the outside, there’s no clear line of sight into one of Ireland’s most closely guarded industrial innovations. Co-founder Kevin O’Toole and chief operating officer Mark Connolly walk me through their research facility, where Exergyn is engineering what they believe to be the world’s first solid-state heat pump that operates without refrigerant gases or direct emissions. The system is built around an…

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