High Efficiency Gas Furnace Combustion Air Intake

These types of furnaces have a dedicated pipeline that runs directly from an outside vent into a sealed combustion chamber of the furnace and a sealed vent to the outside of the home for venting the toxic fumes from the combustion process.

High efficiency gas furnace combustion air intake.

Other aspects of high efficiency furnace venting there are several other important aspects of high efficiency furnace venting. According to the u s. This high efficiency venting system must be installed when you install the new furnace. An obstructed air intake vent pipe in a direct vent two pipe system will cause serious combustion problems in a condensing furnace.

Check to see if the furnace combustion problem is caused by an obstructed air supply pipe by removing the burner compartment cover. 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. This will provide free airflow to the combustion chamber. 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.

This means the furnace does not take air already heated by the furnace and use it for combustion. However condensing furnaces can also be installed as single pipe non direct vent configurations in which the combustion air is drawn from the indoors. Due to high efficiency furnaces having their own fresh air intake no air is drawn from inside your home.