Crypto Heater

 This device is (in the fictional world, and the real world) part of the distributed network of Bitcoin miners. Through computation, it converts electrical energy into cryptographic currency. Uniquely Crypto Heater dissipates the heat energy (a by-product of the computational effort required to be a Bitcoin miner) through a standard household radiator. By offsetting the value of the cryptographic currency produced, against the cost of electricity used, the heater provides subsidized domestic heating.

Source

https://dl.acm.org/doi/10.1145/2757226.2757367

Original Publish Date 2015