Toronto office towers are cooled using frigid water from Lake Ontario

Toronto, Ontario - What keeps Canada Cool? Office towers in downtown Toronto are chilled by frigid water from the floor of Lake Ontario. At 4°C, winter water sinks from the lake’s surface and sits on the lake bottom, because of its high density. Three pipes stretch 5 km out and 83 metres deep into the lake, and draw the icy water to a downtown pumping station, which uses only the coldness but not the actual water to provide a renewable, sustainable alternative to conventional air-conditioning. This innovative deep lake cooling system is now used in over 130 downtown office buildings, including the TD Centre, Royal Bank Plaza, Metro Toronto Convention Centre, Air Canada Centre and Steam Whistle Brewery. Next, the cooling will reach all the way to Queens Park. Toronto Dominion Centre photo by Lucy Izon.

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