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'do you not "collect" the condensation in a box "'. I have a commercial model that uses the same principle as this. It has a reservoir drawer underneath, and the lid is shaped like a funnel with a small hole. So the drips collect, and then you can remove the reservoir drawer and dump it out. I dump mine on my plants, which love the chlorine-free condensation.
"Water cooling should improve the efficiency of the device by 10, unfortunately the water would have be running though constantly. There is also the problem of plumbing". Interesting. I'm tempted to attach a peltier junction to the cold water inlet to my water heater. There's a lot of thermal mass in a copper pipe full of water! And any heat generated will mean the water heater doesn't have to work as hard when it activates. This would be particularly effective for people with a timer recirculation system like the inlaws do in arizona.
author's own site is currently broken, but you can get parts list etc. from the Internet Archive's 2013 copy ( https://web.archive.org/web/20130328204841/http://wiki.chrisgilmer.net/index.php?title=Garduino )
uDuino: Very Low Cost Arduino Compatible Development Board