Guys, rednecks are not necessarily dumb.
The best redneck air conditioner I know of uses well water (approx 45 degrees F [7 C]) run through a heat exchanger with a large squirrel cage blower circulating air through a plenum to cool a store not far from me. After the water goes through the heat exchanger it is used to water the acre or so of lawn. This setup keeps the store at about 74 degrees F [23 C] with no problem and seems to use less electricity than a conventional air conditioner. That well is too full of iron and sulfur to be pleasant to drink, but the owner has found a good use for it. And the lawn looks great all summer long, too.
The best redneck pool heater is to fill the pool with women wearing bikinis (or less). Plenty hot.