 As of 2007, Lennox represented 50% of Ontario installed generation capacity east of the Toronto zone.When operating at full capacity, the plant claims to be the largest user of natural gas in Ontario.The facility is operated solely at times of peak load; the base load for the Ottawa-Toronto region is supplied by Pickering and Darlington stations in Durham Region and by an asynchronous interconnection with Hydro-Québec which has served Ottawa since 2010.