Why More Homes Are Switching From Gas to Heat Pumps

Heat pumps work on the same basic principle as refrigerators and air conditioners: a compressor and heat exchanger move thermal energy from a source (for example, outdoor air or the ground) into occupied space. In buildings they typically distribute heat through radiators or underfloor piping, can be paired with a tank for hot water, and — because the process is heat transfer rather than direct generation — can deliver two to four times the useful heat per unit of electricity compared with conventional boilers or electric heaters. Adoption has been strongest in some northern European countries, undermining the idea that heat pumps cannot perform in cold climates: Norway has heat pumps in roughly 60% of buildings, while Sweden and Finland exceed 40% penetration. Globally, heat pumps supplied about 10% of space‑heating needs in 2021, and sales that year climbed by almost 15%, about double the decade‑long average. Market momentum extends to the United States, where sales have doubled over the past 15 years and heat-pump deliveries exceeded those of natural‑gas furnaces by 32% in the first quarter of 2026. That growth has persisted even after a federal tax credit program (previously up to $2,000 for installers) ended, prompting analysts to conclude the U.S. market is now less dependent on subsidies. Startups are also entering the field: Boston-based Reservoir raised $8 million in seed funding to scale an ultra‑efficient water‑heating system that learns household hot‑water patterns, stores energy, and detects leaks, with plans to expand installations markedly by 2027. Policymakers are supporting the shift in other ways as well. In England and Wales, the U.K. government’s boiler upgrade scheme offers grants (reported at $10,100) for air‑to‑water or ground‑source heat pumps, plus an additional $2,000 for homes not on the gas grid. Beyond heating, heat pumps can reverse their cycle to provide cooling, a feature that is gaining attention in places with rising summer temperatures and low air‑conditioning penetration. However, the climate benefit of heat pumps depends on the electricity mix: where power is still largely fossil‑fuel based, heat pumps will continue to be associated with emissions. Continued technological improvement and cost reductions, together with policy incentives and cleaner electricity, are likely to determine how rapidly heat pumps take root in the coming decades.