Big Tech data centers are not only being used to power the internet but also to heat people’s homes. But who’s really winning when Facebook keeps you warm at night?

Since 2020, Meta’s hyperscale data center — spanning 50,000 square meters on an industrial estate on the edge of the city — has been pushing warm air generated by its servers into the district heating network under Odense. That heat is then dispersed through 100,000 households hooked up to the system, with Meta providing enough heat to cover roughly 11,000.