Central heating systems have a primary heating appliance, such as a furnace, typically located in your basement or garage. All furnaces consist of these components, burners that deliver and burn fuel, heat exchanger, a blower and a flue that acts as an exhaust for gaseous by-products. Direct spark or Hot Surface ignitions operate and control the furnace. Combustion gases are generated by the burners in your furnace and passed through a heat exchanger. The return cold air from your home blows across the heat exchanger to be warmed. It is then blown through a system of ducts to distribute around your home.
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