OTTAWA, Ontario–(BUSINESS WIRE)–The International District Energy Association (IDEA) announced today that registration is now open for the 117th IDEA Annual Conference and Trade Show (IDEA2026). The event will take place June 23 to 26, 2026, at the Rogers Centre Ottawa in Ottawa, Ontario, Canada. IDEA2026 will convene the global district energy community for three days of education, innovation, networking, and technology discovery, bringing together leaders and practitioners shaping the futur