OTTAWA, Ontario–(BUSINESS WIRE)–The International District Energy Association (IDEA), founded in 1909 and representing nearly 3,000 members across more than 30 countries, will convene district energy leaders from around the world in Ottawa, Canada, June 23-26, 2026, for its 117th Annual Conference & Trade Show. Under the theme “Connecting Networks,” IDEA2026 will advance decarbonization, system integration, energy resilience, and thermal network innovation across four days of programming,