Hi all, lets see if I can explain this where it will make some sense. I have an Armstrong Category 4 forced air furnace, model EG6E100DC2018. It is 100,000 BTUs.

It sits in the exact middle of the basement on one side. There is 2.5” PVC that comes out of the furnace for 18”, goes up for 30”, across the basement for 14ft and then has a 9” ‘S’ that leads out the window.

There is also a 4” PVC that comes out of the furnace for 5”, goes up 34”, across for 12ft out the window. It also have a PVC tube that runs across the floor to the sump hole for the condensation.

When the furnace comes on, there is a small motor that starts and runs 1-2 minutes, then the ignition fires up and it does its heating thing, about half way through, the first motor shuts off. All the time the first motor is running the 4” PVC is expelling air that looks like the dryer vent!!!!!

Okay, so what I question,

1. I can understand the motor coming on to expel the carbon monoxide, but why does it continue running through ¬Ω the cycle?

2. All that heat that is going out – shouldn’t that be coming into my house instead of going out?

3. What is the 2½” PVC for? Fresh air? Well, that sure doesn’t make a whole heck of a lot of sense when it is 15 below outside. Take an awful lot of fuel to heat that up to 65-70 degrees…

This just can’t be right, can it?

Any info is much appreciated and I thank you in advance.

Hope you all have a wonderful Thanksgiving!!

MiniFoxx

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