Homemade AC Air Cooling unit produces very cold air. 42F air (in an 80F room). items needed: ice chest (hardsided or styrofoam), pvc pipe, small fan and ice. (small solar panel is optional). great for space cooling. 3 ways to power it: a solar panel, a battery or an automobile (using 12v socket "cig. plug"). this air cooler combines the durability of the "5 Gallon bucket air cooler" with the extra cooling power of the "styrofoam ice chest air cooler". specs: fan: 12VDC 10w 0.8A. solar panel: 15 watt (1 amp). works best in semidry or dry climates. (drier air cools down easier/faster than humid). air temperature during testing 80F (4% relative humidity). block of ice lasted 5 hours (larger blocks can last up to 10). to run the cooler 100% offgrid check out my solar ice making/freezer vids.