Both an AI GPU and a Bitcoin ASIC turn nearly 100% of their watts into heat (1W = 3.412 BTU/hr). The honest difference: the ASIC runs constant and hot 24/7 and earns sats, the GPU runs bursty and idle-cold and earns tokens, and a rented heat box earns you nothing. No free heat, just thermodynamics with a payout.
How to Use a Bitcoin Space Heater: Setup, Efficiency, and ROI Every watt of electricity that passes through an electronic device becomes heat. This is…
Introduction: The Physics of Dual-Purpose Mining Every watt of electricity consumed by a Bitcoin miner becomes heat. This isn’t a byproduct—it’s physics. The first law…
An electric space heater and a Bitcoin miner heat a room with the same ~100% efficiency. So the real question isn’t mining vs. heating — it’s heat that costs you vs. heat that earns back.
Last reviewed May 25, 2026.
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