Since this video is an hour long, the result of digging a small bore hole and routing water pipes through, and hooking those up to a slightly modified window AC unit resulted in a 250 to 300% increase in overall cooling efficiency, and effectively turns a 5000btu air conditioner into a 15000btu unit, but with less power draw than an unmodified (control) 5000btu unit.
This is genius for off-grid setups where power is at a premium - the efficiency gains are insane compared to traditional AC. If you’re running something like this from battery power, you’d want a decent power station with enough capacity to handle the runtime - gearscouts.com has comparisons that show which ones give the best $/Wh for LFP batteries.