@Nisse_Hult brazilian (and engineer) here. Due electrocution hazard, it may sound senseless to use such showers. but you forget that almost all homes here dont need/have a heating or a boiling system (althought some germans friends of mine came here during winter and complained about the cold huehuehue). Most of the country have temperatures over 15oC the whole year. therefore, building a boiling system JUST for showers would be a waste of money, so the combination electrical shower + electrical power is more intelligent.
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@Nisse_Hult brazilian (and engineer) here. Due electrocution hazard, it may sound senseless to use such showers. but you forget that almost all homes here dont need/have a heating or a boiling system (althought some germans friends of mine came here during winter and complained about the cold huehuehue). Most of the country have temperatures over 15oC the whole year. therefore, building a boiling system JUST for showers would be a waste of money, so the combination electrical shower + electrical power is more intelligent.