The paint operations building at the Boeing Salt Lake site has transformed an empty plot of land to the home of a state-of-the-art facility. In October 2013, the 35,000-square-foot (3,251-square-meter) building, used for painting the 787-9 horizontal stabilizer, received LEED Silver certification from the U.S. Green Building Council. To receive the LEED Silver certification, the building was designed to include numerous large windows, which are not commonly used in paint facilities; a rainwater collection system; recycled and salvaged building materials and enhanced environmental controls. But what makes the building stand out are the 3,600 rooftop solar tubes that provide heating for a portion of the paint operations. This addition also makes it the first Boeing paint facility to be partially heated by solar energy.