In 1968, the NDHA became “International” in recognition of its growing membership around the globe, now totaling more than 24 countries. Anticipating the growth of district chilled water systems, “Cooling” was added to the name in 1984. In 1994, the association was renamed again to the “International District Energy Association,” recognizing the economic efficiency advantages and the emergence of combined heat and power (CHP) as an environmentally superior solution.