I think you should check out this website, he talks about Peter Davey sonic boiler, and it has been replicated in Serbia, and Belgium.
You'll find out more here (scroll down 2/3 of the page):
Shocking history of the revolutionary boiler which bits all possible records (in English)
You'll find out more here (scroll down 2/3 of the page):
Shocking history of the revolutionary boiler which bits all possible records (in English)
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