Wanderport Corp (WDRP)

[n1tr08urner]

Ummm, I think there's really only one way to honestly measure the efficiency of something like that. Energy going into the plug (watts hour or whatever) versus energy coming out as heated water (given by the volume and the difference between temperature of water going in and coming out). The 5% difference (if we are talking about 95% efficiency) will be lost as heat to the environment, either from the components in contact with the hot water or from the resistance of the electrical components. These measurements would only be taken while running the unit for a longer time, not switching it on and off so, like they have said as well, some use patterns might actually favor this unit even more over existing electrical ones.

Of course this assumes the flow is good enough for a point of use... use. If there was not enough flow for that the entire device would be pretty useless. But they did say it can be scaled for any use and that they were hooking it up to municipal water so I would not worry about that.