My comfortmaker furnace doesn't have enough upward angle on the exhuast to create the external pressure needed for the furnace to run. So, the furnace comes on and cuts off.

My water heater has a fan on the exhaust so that when it kicks on the exhaust fan comes on and helps exhaust the gas fumes from the water heater. It works great.

I want to do the same for the furnace.

How do I get a fan for my GUK075N12A1. The exhaust tube is a 2" PVC tube.

Thanks

Your unit has a fan built in, The manufacturer does not recommend any additional fans to be in the circuit.

It is best to re-route the exhaust to comply with the owners/install manual.

They will vent to 90 feet or more from the factory depending upon how many elbo's.

Also make sure you don't have any standing water in your horizontal flue line (a sagging pipe) or you might have a discharge /fan problem.