High Efficiency Furnace No Outside Air Intake

Due to high efficiency furnaceshaving their own fresh air intake no air is drawn from inside your home.

High efficiency furnace no outside air intake.

First the gas byproducts can contain residual carbon monoxide that could leak back into your home unless the ventilation pipes are airtight. High efficiency furnace combustion intake from inside or outside. Enerally permissible to install a furnace using indoor air for combustion no outside air intake. Unfortunately the fresh air intake you have described is the second type and does not provide direct combustion air to the furnace room as it is directly connected to the return air plenum for.

See reference 2 in a sealed combustion system as high efficiency furnaces are designed to be outdoor air is essential since the system does not draw any air from inside of the house. Exterior combustion air draw eliminates the useless wasted time that you are now going through. I always tell people to pull from the exterior. 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 that otherwise would have been drawn from the room the furnace is located in.