In the case of the magnetron, I don't see heat moving but rather created from electricity...thus can't be over 100% efficient.
Magnetrons are a completely different animal and it depends on how you determine or measure efficiency. Wait till WDRP comes out with the Intertek results and you will see all kinds of wording to make it sound really really good. Kinda like the last PR - safely complete performance efficiency testing services and analysis, while taking into consideration the unique nature and characteristics of Wanderport's microwave water heating unit and technology
You think we can buy a WDRP water heater this Christmas?