[xattt]

A local company has developed a heat pump with a thermal energy storage system. Not sure how they do this, but I imagine there is some sort of insulated cinder blocks on a secondary loop that shuttles heat/cold to where it needs to go.

(1) https://stash.energy/en/product/

[folmar]

They try very hard not to be specific, but the industrial heat accumulators are usually just water.

[xattt]

> … heat accumulator

Thank you for helping me learn a new HVAC term!