The basic idea behind the heatpunk movement is quite simple: Bitcoin mining generates Bitcoin and heat. If you can capture the heat generated and use it to heat your home, you could earn Bitcoin and perhaps even make a profit on top of energy use you were already going to spend.

"If 1% of comfort heating were converted to hashrate heating at the current estimated average mining chip efficiency of 25 J/TH, we'd add over 1 ZH/s to the network, effectively doubling its computational size."