12/14/2023 0 Comments Furnace filter flow direction![]() The arrow on an air filter for a furnace should point in the direction of the airflow, which means it should point towards the furnace or air handler and away from the return duct that carries the air in need of heating or cooling. If the old filter has already been removed, you can use these tips as a guide when replacing furnace filter. The easiest way in determining which way the furnace filter direction is to refer to the old filter before removing it and installing the new one in the same way. Where the arrow of the air filter should point towards when replacing furnace filter? Which way does the arrow go on my furnace filter?
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