yeah, that is nothing new, friend uses heat from small datacenter (i don't think that 20 racks constitutes datacenter, but i am not sure if there is better word 😀) he has in a basement of that building to contribute to its heating.

i really mean if you could make bitcoin coffee-maker and if it could eventually pay for the price difference between normal and bitcoin one and how much coffee would you have to drink to make that work.