As stated in technical parameters: the water pump output is 30-1500 liters/hour, it means max 0.4 liter per second. Assuming it raises the temperature of water by 40 degrees K, the energy output per second is 4200J/kgK 0.5kg * 40K = 84000 Joules/sec = 84 kW. Assuming it draws 167kW, it's much worse than any electric water heater.
But let’s be optimistic! If we pick the maximum range in the technical specification [1] and suppose that the temperature difference were 120°C then it would only generate 0.21MW [2]. Just in case, I checked and at 4Bar, the boiling point of water is 144°C [3], so the device is not producing vapor, only hot water.
