http://www.infoworld.com/d/green-it/crank-datacenter-heat-care-907 http://searchwarp.com/swa517963-The-Data-Center-Temperature-Debate.htm Sun Microsystems, both a prominent hardware manufacturer and data center operator, estimates a 4% savings in energy costs for every one (1) degree increase in server inlet temperature. (Miller, 2007) A higher temperature setting can mean more hours of free-cooling possible through air-side or water side economizers. This information is especially compelling to an area like San Jose, California, where outside air (dry-bulb) temperatures are at or below 70 deg F for 82% of the year. Depending on geography, the annual savings from economization could exceed six figures.