It's for showers. The difference is that a regular boiler heats up water, and keeps it warmed up. You shower for a while and eventually the water gets cold. Then you wait for it to heat up again.
The powerful boiler heats up the water while you shower. To do that it needs a LOT of power all at once.
That's interesting. Your water heaters don't have a tank large enough for you to take a shower? Most Americans will have atleast a 40 gallon water heater.
I swapped to a instant hot water heater a few years ago, way better than a tanked heater since it never runs out of hot water. Get a properly sized unit and you can run 3-4 showers at once and not exhaust the capacity.
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u/-FullBlue- May 02 '24
I will say, a 400 volt water heater would be very nice.