Hi, I bought a commercial building that has a fairly new Goodman GDS80804 gas furnace that was apparently installed to replace an earlier unit as the duct work is far older. The problem is that the furnace pulls the air from the output registers and blows it out the input where the filter is cut in.
Is there a way to reverse the airflow by changing the motor and fan, or is there more to it. From the outside, this downflow furnace looks like the upflow model that should have been installed, but they have different part numbers.
Any insight greatly appreciated.
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