Automatic Temperature Control System
1895
Warren S. Johnson (1847-1911) built and patented the first multi-zone temperature control system that could be economically manufactured, installed and maintained. The Johnson Controls pneumatic temperature control system, represented by artifacts on display in this building, became the standard for commercial and public buildings throughout North America and helped launch the modern building controls industry.
Marker is at the intersection of Michigan Street (U.S. 18) and Jefferson Street, on the right when traveling east on Michigan Street.
Courtesy hmdb.org
