My DIY geothermal AC

For a winter project I started building a homemade geothermal air
conditioner. Our house is located only 20 feet from our lake. The
temperature of the water at 15 feet is 55 degres even in the summer. I
bought a radiator core from an old ac unit and soldered on some 1"
Hose fittings. You simply pump cold water from the lake, through the
radiator and straight back into the lake. A box fan placed behind the
radiator blows the cold from the radiator into our house. A nice green
and cheap way to cool your house. The only running cost is the fan and
electric pump. This thing is effective but ugly so I gutted an antique
radio we got last summer. The whole unit fits perfectly inside the
radio. My brother is going to wire it for me so when you turn the knob
the pump, fan, and radio lights come on!