Homemade AC Air Cooling unit produces very cold air. 42F air (in an 80F room). items needed: ice chest (hard-sided 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”). According to a top-rated AC company, 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 semi-dry 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% off-grid check out my solar ice making/freezer vids.