Understanding the Difference Between Upflow and Downflow Furnaces
Most furnaces in the US are upflow furnaces, as this is the most effective type of furnace. There are also downflow furnaces, but these are typically only found in places with warmer winters or when the layout of the home can’t accommodate an upflow furnace. Upflow vs. Downflow Furnaces The only real difference between upflow and downflow furnaces is the direction that the air flows through them. In an upflow furnace, the cool air being brought in by the blower flows into the bottom of the furnace and the heated air flows out of the top. Downflow furnaces work oppositely....
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