LOL. C'mon.. "new technology" doesn't mean they violate the laws of thermodynamics. My approach is simply to see what is the minimum energy input required to heat water (i.e. in theory).
The WDRP unit is 99% efficient, so it's a good exercise to run the math to determine the possible power configuration of the water heater.
I'm not saying it's not possible.. I'm simply trying to figure out how much power the unit will use for a given flow rate and temp increase. The extent of my speculation was to simply state than a 30a unit at 220V cannot heat that much water that fast, unless there is some other factors at play (pressure, waste-water heat exchange, etc.). Or, as has been pointed out, I'm off on my numbers (temp of a shower, flowrate, etc.).
The soft DD appears to have been done already, and done very well at that. Seems nobody here wants to play math?
Tyk
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