The combustion air intake usually is piped from the exterior of the home to the furnace.
High efficiency furnace combustion air intake.
This high efficiency venting system must be installed when you install the new furnace.
Since high efficiency furnaces draw air directly from outside the furnace itself does not require a fresh air intake in order to replace inside air.
The main difference between a conventional furnace and a condensing furnace is the heat exchanger technology used to extract heat from the combustion process and exhaust the combustion gases.
Other aspects of high efficiency furnace venting there are several other important aspects of high efficiency furnace venting.
A high efficiency condensing furnace is a little more complex than a conventional furnace and troubleshooting is somewhat more complicated since there are more potential problems.
Unlike conventional furnaces a condensing furnace often uses a sealed combustion chamber and direct vent combustion air.
Department of energy a defining feature of high efficiency furnaces is sealed combustion a process by which outdoor makeup air is piped directly into the burner.
The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.
Due to high efficiency furnaces having their own fresh air intake no air is drawn from inside your home.
This means the furnace does not take air already heated by the furnace and use it for combustion.
According to the u s.