IDEA Celebrates 100 Years! Special Anniversary Section
1935 –1959
1909 –1934
IDEA was founded as the National District
Heating Association on July 15, 1909, in
Toledo, Ohio. IDEA and its predecessors
have held an annual conference every
year since, except 1918 when the confer-
ence was not held because of World War I.
For more historical details, please visit
www.districtenergy.org/idea_history.htm.
1960 –1984
1985 –2009
