When heat is termed for during the night, or sunless hours, or winter, humidified air flows through the zeolite. Given that the humidity is adsorbed from the zeolite, heat is launched into the air and subsequently into the setting up House. This form of TES, with precise use of zeolites, https://www.gledhill.net/products/thermal-storage/boilermate-ov-pre-plumbed/