📝 Executive Summary
Finnish startup SunBit has deployed 30 'Bitcoin Boiler' systems that use mining rigs to heat homes, aiming to offset energy costs with mining rewards. While the systems provide consistent heat regardless of outdoor temperatures, their profitability relies on bitcoin prices remaining above a break-even point of roughly $70,000. With the next halving expected in 2028, homeowners face potential margin compression that could impact the three-to-six-year payback period.