Ceiling height construction window size and placement and dozens of other variables all need to be considered to properly size a heating and or cooling system.
Goodman furnace exhaust pipe size.
Goodman 96 afue gas furnace has 2 pipe direct vent to outdoors.
Outdoor exhaust intake combustion pvc venting.
A professionally conducted load calculation is the foundation of an effective system.
Measure the diameter of the circular flange where the vent attaches at the back of the furnace.
In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents some high efficiency furnaces also include a plastic pipe for intake area and all types.
Since the exhaust pipe is running on a sidewall the fan works together with the furnace.
This determines the size of vent pipe fittings and flashing needed to install the vent system.
Also known as the induced draft fan this one has a fan that is located on the end of the pipe.