Here’s a five gallon cooling system made by DesertSun02. How to make a non-compressor based “5 gallon bucket” air conditioner. simple DIY. items needed: bucket, styrofoam liner, pvc pipe, small fan, and ice. (small solar panel is optional). one frozen gallon jug of water lasted 6 hours. temperature in house was 84F. cooled air was in the mid. 40F range