m Ransley writes:

Well rich you really show your stupidity and ignorance on tankless
units. Swindlers like Bosch

The swindling is in the advocacy and the selling, not the making.

These things are made in Europe and Japan because their housing stock is so
wretchedly small, expensive, and retrofitted back to medieval times, they
can't afford a few sq ft for a tank water heater. All their appliances are
mini-sized and overpriced. Efficiency or the lack thereof has little to do
with it.