They need to upgrade to the Irish version [1]. Presumably these are safer, and the flow rate and temperatures are probably better. Mine is rated at 9kW, so it can get a decent stream of piping hot water going in no time.
They are really popular here, and every house that I've been in has at least one shower with one of these installed.
Honestly not sure why though. I come from a country where hot water came from a tank and it's pressurized to ~3 bar, and showers are glorious. So I don't understand why they are so popular in some places. I have a hot water tank (called "immersion") in my apartment, yet it's not plumbed to my shower, it only goes to the bath and basins. And seemingly this type of arrangement is not very popular in Ireland. I guess the benefit is that teenagers taking their time in the shower can't drain the hot water tank, so there's always hot water on demand. Probably also more energy efficient in the long run.
They are really popular here, and every house that I've been in has at least one shower with one of these installed.
Honestly not sure why though. I come from a country where hot water came from a tank and it's pressurized to ~3 bar, and showers are glorious. So I don't understand why they are so popular in some places. I have a hot water tank (called "immersion") in my apartment, yet it's not plumbed to my shower, it only goes to the bath and basins. And seemingly this type of arrangement is not very popular in Ireland. I guess the benefit is that teenagers taking their time in the shower can't drain the hot water tank, so there's always hot water on demand. Probably also more energy efficient in the long run.
1 - https://www.screwfix.ie/c/showers/cat820272?showerproducttyp...