From https://norwegianscitechnews.com/2026/01/pretty-soon-heat-pu... :

> Salt hydrates thus open up completely new possibilities for smart and more balanced heating systems because heating can be moved to times with low energy demand.

> “Salt hydrates aren’t toxic, they’re not flammable and they are also relatively inexpensive. This makes them a safe and good choice for use in private homes. Heat storage with salt hydrates also takes up less space than a traditional hot water tank, often up to four times less,” says Simonsen

[...]

> To solve this [oxidation in aluminum heat sinks] problem, the researchers have employed a type of coating called plasma electrolytic oxidation (PEO), which forms a thin, ceramic layer on the surface of the aluminium