First National Bank of Omaha installed a fuel cell system in 1999 to provide primary power to its data center in Omaha, Nebraska. In more than 89,000 hours of operation through October 2009, the system is estimated to have reduced heating bills by more than $1 million. An independent third party verified that the designed total power system availability—including the use of four fuel cells, four rotary uninterruptible power supply systems, and other equipment—exceeded 99.9999%.