Today's Boiler
Summary
Ottawa's $3.5 billion Energy Services Acquisition Program (ESAP) is transforming one of North America's largest legacy steam district energy systems into a low-temperature hot water network serving more than 80 federal buildings, including Parliament Hill. By combining low-temperature distribution with electric boilers powered by Hydro-Québec's low-carbon grid, high-efficiency peak-load boilers, and advanced digital controls, the project is expected to reduce energy use by 20–30% while creating a flexible platform for future electrification. Project leaders emphasize that successful decarbonization depends on integrated system design—coordinating generation, controls, piping, and operations—rather than simply replacing equipment, making ESAP a leading example for large-scale district energy modernization.
"Ottawa's ESAP project demonstrates what's possible when long-term planning, modern engineering, and a commitment to decarbonization come together," said Rob Thornton, President and CEO of IDEA. "By moving from steam to a low-temperature hot water network, the project isn't simply upgrading infrastructure—it's creating a flexible platform that can integrate electrification, renewable energy, and advanced controls for decades to come. It's an outstanding example of how district energy systems can evolve to meet today's climate and resilience goals while maintaining the reliability critical public institutions depend on."
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