Rheem-Ruud AE-77695-81 Heat Exchanger Tube & Gasket

The Rheem-Ruud AE-77695-81 Heat Exchanger Tube & Gasket is an essential part of your gas furnace heating system. It is a thin long cylindrical structure made of either aluminum or steel and is essential in transferring heat from the combustion chamber to the air used in your home. In use, hot gasses are circulated through the heat exchanger tube while the heat is transferred to the metal. The cool air is then passed over the heated exchanger to pick up this heat and then circulate warm air all over your house.