A boiler heating system in Toronto operates using natural gas, oil, electricity, or propane to ignite a combustion chamber or pilot, heating water inside the boiler chamber. The hot water then circulates through pipes to the home’s distribution system, such as iron radiators, copper fin baseboards, air handlers, or in-floor radiant heating. If you plan to connect a boiler to existing ductwork, you’ll need an air handler installation to distribute warm air throughout your home.