East Room, Blue Room, State Dining Room, Lincoln Bedroom, and Lincoln Sitting Room. During the administration of George W. Bush, First Lady Laura Bush refurbished the Lincoln Bedroom in a style contemporary with the Lincoln era; the Green Room, Cabinet Room, and theater were also refurbished. The White House became one of the first wheelchair-accessible government buildings in Washington when modifications were made during the presidency of Franklin D. Roosevelt, who used a wheelchair because of his paralytic illness. In the 1990s, Hillary Clinton, at the suggestion of Visitors Office Director Melinda N. Bates, approved the addition of a ramp in the East Wing corridor. It allowed easy wheelchair access for the public tours and special events that enter through the secure entrance building on the east side. In 2003, the Bush administration reinstalled solar thermal heaters. These units are used to heat water for landscape maintenance personnel and for the presidential pool and spa. One hundred sixty-seven solar photovoltaic grid-tied panels were installed at the same time on the roof of the maintenance facility. The changes were not publicized as a White House spokeswoman said the changes were an internal matter. The story was picked up by industry trade journals. In 2013, President Barack Obama had a set of solar panels installed on the roof of the White House, making it the first time solar power would be used for the president's living quarters. Layout and amenities Today the group of buildings housing the presidency is known as the White House Complex. It includes the central Executive Residence flanked by the East Wing and West Wing. The Chief Usher coordinates day to day household operations. The White House includes six stories and 55,000 square feet (5,100 m2) of floor space, 132 rooms and 35 bathrooms, 412 doors, 147 windows, twenty-eight fireplaces, eight staircases, three elevators, five full-time chefs, a tennis court, a (single-lane) bowling alley, a movie theater (officially called the White House Family Theater), a jogging track, a swimming pool, and a putting green. It receives up to 30,000 visitors each week. Executive Residence The original residence is in the center. Two colonnadesone on the east and one on the westdesigned by Jefferson, now serve to connect the East and West Wings added later. The Executive Residence houses the president's dwelling, as well as rooms for ceremonies and official entertaining. The State Floor of the residence building includes