> That's for 5000 people.

And it's quite compact.

> And only covers heat.

Is that not useful?

Don't get me wrong, this is cool. We just have some stricter requirements on a country/state/union level that while this might help with parts, I don't see how it can easily scale up and generalize

It scales up just the way that siloes on farms scale up ... you build more of them.

And the Finns put a priority on staying warm. For normal electrical generation, they largely use wind with a growing solar fraction.