It is very low cost to operate, compared to a central a/c, and provides spot cooling/heating, only cooling/heating the areas you want to cool/heat, heatly.
It is also eco friendly, because it uses water as refrigerant, and it can multi-task, cooling/heating the room, while cooling/heating your beverages (or whatever) in the cooler.
Step 1: Step One: Supplys
Salvage from the house(or Walmart):
1 Box Fan
Est. cost $0-$25
Buy at Lowes:
1 Smartpond 155 gal/hr fountain pump
1 20' box of 1/4"(ID) copper tubing
1 20' coil of 3/8"(ID) vinyl tubing
2 hose clamps
1 pack of zip ties
1 Cooler-32qt(8 gallons)
Est. Cost $50.00
Congrats. You just got through step one.
Step 2: Step Two: Build It.
place a zip tie every 6" of copper. Once finished coiling, attach vinyl tube to feed end of copper.
Then, lead the tube to the pump. Connect it. then, cut the tube in half. Clamp the remaining half of tube to the return line, and lead it back into the cooler. Use the hose clamps to clamp down the connection between the copper and the vinyl tubing.
Step 3: Step Three: Enjoy It.
Step 4: Specs
Step 5: Updates
1. I cut the kink out, making the flow faster and it cools better.
2. I got another cooler that is bigger, more insulated, and doesn't leak(FINALLY! No more moldy carpets!)
3. I have re-worked the system with a radiator!
4. I also added some safety labels, pic 3.
5. I added an internal coil of copper to the cooler. The returning water runs through the copper, transferring more heat. This method works a lot better than my original method.
6. I insulated the water lines
7. I added more copper on the back of the fan for more heat exchange.
8. I made another version. https://www.instructables.com/id/home-made-air-conditioner-version-two/#