Recuperators: Make the most of waste heat from exhaust gases to preheat incoming air or gases, increasing combustion performance. It's not only economically beneficial because of the limited payback period of time, but What's more, it contributes to a far more sustainable field by reducing waste and decreasing CO2 emissions. https://agency-social.com/story5458907/the-fact-about-waste-heat-recovery-that-no-one-is-suggesting