Furnace Intake And Exhaust

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.

Furnace intake and exhaust.

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. The exhaust pipe has two 90 degree fittings at the top of the pipe which gives a 180 degree turn and the exhaust opening is pointed straight down. Take a mental note of where they exit the building and head outside. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.

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First locate your furnace and find the intake and exhaust pipes. They are usually white or black pvc pipes that exit a wall near your furnace. However these combustion gases contain residual heat that is lost through the ventilation. Due to high efficiency furnaces having their own fresh air intake no air is drawn from inside your home.

Furnace intake and exhaust pvc. Once outside look for the intake and exhaust pipes.