QuoteA practical embodiment of the inventive apparatus, installed on Oct. 16, 2007, is at present perfectly operating 24 hours per day, and provides an amount of heat sufficient to heat the factory of the Company EON of via Carlo Ragazzi 18, at Bondeno (Province of Ferrara).
>10 f'n years ago!
https://patents.google.com/patent/US20110005506
Of course, it's obsolete so nobody wants to buy an obsolete device even though it can heat a whole factory for practically no fuel costs. Nobody even wants to get one for research. What a pity. I bet if Rossi had contacted Musk, Musk would have sent the prototype into space along with the Tesla roadster.