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.
Being 50% more efficient doesn’t mean doing twice the work costs less. The bigger the gradient, the more work it’s doing. All that means is an exceptionally hot day won’t cost exceptionally more to cool your house than a cooler day.