Yes. They're likely referring to on-demand electric heating units that are installed near the shower head. Our World in Data is based in the UK. Electric showe

Yes. They're likely referring to on-demand electric heating units that are installed near the shower head. Our World in Data is based in the UK. Electric showers like this one https://www.mirashowers.co.uk/p/showers/shop-electric-showers https://www.mirashowers.co.uk/p/showers/shop-electric-shower... are more common there than they are in the US.