Recuperators: Use waste heat from exhaust gases to preheat incoming air or gases, enhancing combustion efficiency. Every hour your furnaces operate, your boilers churn, your reactors do their position — you’re losing heat. And never just a bit. The NREL ESIF facility signifies the way forward for waste heat recovery. https://purethermal.co.uk/media-news/november-launch-waste-heat-recycling-design-support-service-from-pure-thermal-and-oilon/