#Lennox furnace parts heat exchanger professional#
The performance and longevity of a furnace heat exchanger can be improved through regular or annual furnace maintenance performed by a professional HVAC technician. Flue gas is vented onto a second heat exchanger in the high-efficiency condensing furnaces, where extra heat is taken out from them and used to further heat the building.
Once the flue gas heat has been delivered to the heat exchanger walls, they are blown out of the heat exchanger and vented out of the building. An incorrectly screened exchanger might lead to a mixture of hazardous gases and air.
To function correctly and to block flue gases from escaping the combustion chamber, the heat exchanger must be fully sealed. Each pair of plates forms a channel that one gas can flow through, and the pairs are stacked and attached-through bolting, brazing, or welding-to produce a second pass between pairs that the other gas can flow through. This warm air is then spread around the house or building's ductwork.įurnace heat exchangers may consist of tubes or coils which connect to the burner on one side and a vent or flue pipe on the other, or they can be plate heat exchangers made up of multiple thin corrugated plates. The air blows across its surface on the other side, heating the breathable air quickly while the chamber heats the exchanger with flue gases. They are also known as "flue gases." That’s where the heat exchanger comes in.Ī heat exchanger for a furnace is a thin metal shield that sends hot air out of the furnace into the living space of your house through air ducts. The gas mixture alone, however, is not safe to breathe and is not suitable for heating the house by itself. This combustion process generates heat energy from the fuel. In a sealed chamber, furnaces combust fuel to produce heat.
Each furnace has a heat exchanger, which is an important aspect of the heating process.
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