Brick toaster aims to cut global CO2 output by 15% in 15 years

https://newatlas.com/energy/rondo-heat-battery-brick-toaster/

"pull heat out 98% efficiency... cheap industrial heat storage... costs one fifth... optimized for low cost, super-fast deployment and scale, and capable holding heat 1,500 °C... cover approximately 80% of industrial heat requirements globally. Down the track, using more expensive heaters and brick materials chosen for the purpose, he says it's possible to hit 1,800 °C (3,272 °F) or so, which brings steelmaking into range, and would cover somewhere around 92% of industrial use cases"