General Montgomery C. Meigs coordinated the design and installation of the first heating and ventilating system in the U.S. Capitol. The House of Representatives section (the south wing) and the Senate section (the north wing) had heating and ventilation installed in the 1850s. In what year was the system upgraded?

a) 1889

b) 1906

c) 1914

d) 1922


b) 1906