I have had a consept.. kicking around for.. Probably 10 years. I want to try "mains fed water cooling", "cool" depends on the season) mains water would be circulated around the system, using standard water cooling fittings (but without a pump and maybe even a rad), achieving sub ambient temps. Where to dump the running water? It could just be pored down the drain for best cooling, but I imagine it could just be put back into the system as a passive.. ish system, dissipating heat throughout the system, until a toilet is flushed or a tap is turned on boosting the effect.
Loved whole room water Cooling (actually another idea I'd thought of but you did it wrong ?). I don't have the time or the resorses to try it myself only to see it fail (though I'm convinced it.. "Should" work OK if not well).
Please consider giving it a try.
I'd be very interested to see if the water would become too warm the be considered "cold" water.
My hunch is that even doing a burn in test should see great temps at 0db (if there needs to be a rad does it even need to be in the same room?)
Don't data centers do something like this?