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Toronto Net Zero District Energy System

January 12, 2022 by

City of Toronto Net Zero District Energy System

Timeline: 2004 onwards.

A number of City-owned buildings, including City Hall, Metro Hall, Police Headquarters, Union Station and Old City Hall, are kept cool in the summer by an innovative deep lake water cooling system. Provided by Enwave Energy Corporation, the system uses cold water from Lake Ontario to cool buildings, replacing conventional chillers and cooling towers.

The system is ideal for heritage buildings such as Union Station and Old City Hall since cooling can be provided without major renovations.

The use of deep lake water cooling at City Hall, Metro Hall, and Police Headquarters reduces electricity use by 12 million kWh annually.Timeline: 2004 onwards.
A number of City-owned buildings, including City Hall, Metro Hall, Police Headquarters, Union Station and Old City Hall, are kept cool in the summer by an innovative deep lake water cooling system. Provided by Enwave Energy Corporation, the system uses cold water from Lake Ontario to cool buildings, replacing conventional chillers and cooling towers.

The system is ideal for heritage buildings such as Union Station and Old City Hall since cooling can be provided without major renovations.

The use of deep lake water cooling at City Hall, Metro Hall, and Police Headquarters reduces electricity use by 12 million kWh annually.

Learn more Explore more actions


Municipality: Toronto

Action: Net zero carbon district energy systems

Category: Energy



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