Heating houses : https://qarnot.com/en/home/ https://qarnot.com/en/home/ Basically they install 'heaters' in your house which are actually servers in disguise.

Heating houses : https://qarnot.com/en/home/ https://qarnot.com/en/home/ Basically they install 'heaters' in your house which are actually servers in disguise. I think they also have a boiler now. They're not the only ones though - I believe that in a number of places in Northern Europe, if you want to setup a datacenter in town, it has to be plugged to a (public?) water heating system.