The booming Toronto housing market has been a boon for Canadian water-heater rental firm EnerCare. The company managed to match the street's expectations in the second quarter thanks to its Ontario-focused business. But is the housing cooldown in Canada's largest city a threat to EnerCare's outlook -- and might it alter the company's expansion plans south of the border? John Macdonald, president and CEO of EnerCare, speaks on "Bloomberg Markets Canada." (Source: Bloomberg)