Regarding the HHO. Please give some proper numbers instead of the misleading /liter ones. Ideally the HHO produced would be measured in units of energy or power! But knowing the mass is a pretty good next best.

Have you found the pressure where efficiency is greatest? Is that at complete vacuum? Or maybe even at high pressure??



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That cooling system sounds great. Is it 25ft deep or 25ft length spread around? How spread around it is?

I suppose you can get away with recirculating the same water because it's not using much. Perhaps if you cooled a whole building you'd need such a huge amount of piping underground you might as well just pay a bit more for pumping.