> The once-obscure devices experienced a surge in popularity in Europe after Russia’s full-scale invasion of Ukraine sent gas prices soaring. This feels, ah, a

> The once-obscure devices experienced a surge in popularity in Europe after Russia’s full-scale invasion of Ukraine sent gas prices soaring. This feels, ah, ahistorical. Looks like sales grew steadily from ~750k/y in 2013 to 1.5m/y in 2020, then surged. Hardly 'obscure'; at least in Ireland most new houses had them by the late 10s (it was quite difficult to meet the buildings energy performance directive without them). What really happened in particularly 2021-2023 was that people were replacing existing non-eol gas boilers with heat pumps, as rising gas prices made this more financially attractive.