[Moonman62]

It depends on the TEMPERATURE the unit was run at. The picture shows nothing more than water scale from heat, (lots of it). If they had used distilled water or even a commercial antifreeze as a transfer fluid the inside would probably be pristine.

I would assume that the home units will have city or well water running through them. What are they going to look like after six months? And how do you know it's just water scale, and something else isn't involved? That's a lot of scale for a few hours operation.

[BallandPowder]

Powder..patch..ball FIRE!

Have you EVER in your life cleaned out a hot water heater? EH? They work perfectly fine for YEARS or DECADES processing hot water with electric heating elements while precipitating scale all the time..

What on earth makes you think this technology would be any different? (OH yeah - gotta maintain the argument).