I plugged the leak in my ac coil, ran a couple water hoses through the styrofoam i my bedroom window, put the box fan behind the coil, and now i have AC! Problem is that it uses about 80 watts. In order run it for any length of time, I will have to run it when the sun is shining. Or else it will run my solar batteries down, and the inverter will cut off. I need to make a smaller version using a heater core from that old truck, and my little personal fan. To really do this right, i need to build a heat exchanger coil to go into the ground, instead of just wasting water. But it's nice to know it really works! I'm very cool and comfortable sitting in front of this contraption. It feels about like a window unit on low. I might just turn it off in a little while, then cut it on when i'm ready to go to sleep. If i lose power during the night, at least i'll be asleep. I sure wish i could afford another panel and a couple more batteries. Some day soon maybe. Whoot! I got geothermal cooling!