In finnish, the term is ”kaukolämpö”, literally ”far heat”.
You dont heat a ”district”, you heat the entire city. I mean, electricity wires go everywhere, why not heating pipes.
And so the network for Helsinki looks like this: https://twitter.com/energiahelen/status/1511998227008176129?...
The red lines is the heat pipe network, it covers the entire city.
When Americans talk about ”district heating” they miss the scope of the thing.