On 05/05/2019 14:57, Jim K.. wrote:

Indeed. More plumbing needed with the storage one, costs more to
buy & run... I'll start with the sprinkler & see how it
goes.
Cheers



In Germany, they have massive instant hot water heaters. For example,
this shop stocks heaters up to 27kW, run off a three phase supply.

https://www.bauhaus.info/durchlaufer...334%3A21%5C+kW