I was thinking of a non-attached (open-loop) water mod for my Sanyo.
Drill two wells and install a water-to-air exchanger behind the Sanyo,
so most of the air pulled into the Sanyo has to pass through it.
It would be great on those hot summer days, since I could use PV for the water pump.
It would have to be self-draining, so no water would stay inside any of the plumbing,
when the power was off.
The ground water here is 60-65 degrees F. So, I think it would do good
during the summer, and might even be good when it's really cold too.
But, I don't know if a low dew-point and high humidity on cold days
would ice-up the A-W exchanger.. Maybe the right amount of 'warm'
water flow will keep the plumbing so warm, it will just drip off and not
build up an ice-cake.. It would need to be adjustable.
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