Innovation turns AI excess heat into community energy

Data centres are a critical infrastructure that enable today’s modern life, but with the increased demand for AI, power demands are increasing in parallel. But what if their excess heat could be repurposed to fuel sustainability and resilience in local communities? In Markham, that future is already unfolding.

At the centre of this innovation is Equinix’s TR5 data centre, which is working with Markham District Energy (MDE) to redirect surplus heat from its operations into a municipal heating network. Heat exported from its TR5 facility now feeds into the Markham District Energy scheme, which serves over 14 million square feet of mixed-use development, including more than 9,000 homes, local businesses, two municipal swimming pools, and York University’s new Markham campus—a real-world example of circular energy in action.

Markham has long been a pioneer in district energy. Following the 1998 ice storm that affected Quebec and parts of Ontario, which exposed vulnerabilities in the power grid, the city launched MDE in 2000 with its first energy centre, which supported IBM Canada. Today, MDE operates multiple combined heat and power (CHP) facilities, including the Warden, Birchmount, and Bur Oak Energy Centres, making it one of North America’s most advanced and integrated municipal energy systems.

While peak summer conditions may occasionally generate more heat than needed, the long-term goal is to recover and reuse 100 per cent of excess heat—a goal that becomes more achievable as new developments connect to the grid.

“This is a win-win for everyone involved,” said Marc Mondesir, managing director of Equinix Canada. “By partnering with Markham District Energy, we’re helping build more resilient communities while advancing our global climate goals. It’s a powerful example of what happens when digital infrastructure supports not just connectivity, but community.”

This innovation comes at a crucial time. AI is driving a surge in energy demand, with research estimating that a single AI query can use up to 10 times more power than a standard Google search. Large language models, such as ChatGPT or Gemini, require massive computational resources, generating significant heat that data centres must manage. This makes efforts like MDE’s even more urgent—and globally relevant.

Equinix’s broader Heat Export Program, with active projects in Canada, France, and Finland and others under development, offers surplus heat to utilities and municipalities at low or no cost, enabling district energy systems to decarbonize more quickly and affordably.

For Markham residents, this initiative reduces reliance on fossil fuels, strengthens the city’s energy resilience during outages, and contributes directly to its net-zero targets. It’s also a glimpse into how smart infrastructure can serve both the digital economy and the physical communities around it.

Markham’s model is no longer just a local story—it’s a blueprint for climate-conscious cities worldwide.