Waderport Corp. - a water heating technology company - just announced the completion of a microwave energy tank-less water heater built with the company's proprietary microwave heat-engine technology.
Considered by the company to be the first of its kind worldwide, the unit -- which is best known as the "multi-cavity microwave heating unit -- uses microwave energy or radio frequency to heat water, rather than traditional heat elements and thermal transfer. According to a company spokesman, the unit has the potential to compete with other efficient water heaters on the market both from an energy saving standpoint and, eventually, a price standpoint.
A third party laboratory is currently performing testing and analysis on the unit to confirm the company's "informal efficiency claims." So it looks like we'll have to wait and see just how efficient this new technology is.