The advantage if any will be the speed of transfer of the energy at molecular level and savings of no residual heat in standby mode over traditional resistance electric exchangers, and recapture of magnetron heat from water cooled mags. If radiation can excite all the molecules instead of only those that touch the element, and thereby the warm up time is eliminated and the cool down period of waste also... we may have something....we shall see. Point of use is more likely than whole house IMO. GLTA!