This discussion seems to have degenerated somewhat.
I'd like to know more about Signor Rossi's Quackex.
Like is it possible to maintain an energetic plasma under the conditions described?
How much current could pass through such a plasma? How could it be measured?
Would it be interesting to put a power meter across the input power supply to check what power was being delivered to the system, rather than making dubious calculations from incomplete data? Seems more sensible than messing about with 1-ohm resistors and cheap voltmeters
(I hope and trust that any potential investor in the Quackex would insist on that as a minimum before even opening discussions)
And lastly, I am still clinging to the vain hope that someone will explain to me why an industrial user with a requirement for hundreds of KW of heat would prefer a system of hundreds of tiny units as opposed to say a system of 4 x 250 KW ecats