It would be amazing if we could invert the function of the LHE with a button in two modes: Heat Output (Normal) and Heat Input. When the LHE consume HU it heat liquids intead of coolling them, this function is perfect to storage of HU or EU (in HU), heating cooling in hot cooling and pohehoe lava in lava (I don't say water in steam beacuse steam boiler do this).
