> This "waste heat" system is a closed loop of efficiency. The 60+ kilowatts of heat energy produced by a storage cluster is not a byproduct to be eliminated but a resource to be harvested.

Are there any other data centers harvesting waste heat for benefit?

The EU mandates that all large data centres built/commissioned from July this year will make use of waste heat:

https://www.twobirds.com/en/insights/2024/germany/rechenzent...

Yes, plenty - sometimes data centers are built together with apartment or office complexes for this particular purpose. Unfortunately that already pinpoints the core limitation, due to the low-temperature of the data centers. The higher the temperature difference is, the more affective heating becomes - with air cooled systems it requires preparation to ensure that can be used for heating.

Also data centers need physical space, and often - you need heating where there is not a lot of space (cities), and for "district heating" you need higher temperatures usually.

Yandex had a data center in Finland,, not sure if it's still operational. It was heating 1500 homes with 4 MW.

https://www.euroheat.org/dhc/knowledge-hub/datacentre-suppli...

Several swimming pools do to great effect:

https://datacentremagazine.com/data-centres/excess-data-cent...

https://www.bbc.com/news/technology-64939558

https://arstechnica.com/information-technology/2023/03/free-...

I know that ~ 15 years ago we were already using datacenters in The Netherlands that were used to heat houses in a city.

I do vaguely remember that the economics of it all were not great, but it’s definitely a thing for quite a while already.