![Two large heat pumps enclosed behind a metal gate and surrounded by a row of small potted plants](https://img.canarymedia.com/content/uploads/compressed-tokyo-heat-pumps-lots-of-small-potted-plants.jpg?auto=compress%2Cformat&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=392&q=80&w=676&s=79588ee22014f0d012fa7286d3489d2b)
Heat pumps
Heat pumps are already ubiquitous in Asia. When will the US catch up?
A recent trip to East Asia prompted our correspondent to reframe his understanding of heat pumps, the crucial tool for cleaning up the heating and cooling of buildings.
By Julian Spector .