Which Way Does Hvac Air Filter Go. There should be airflow arrows printed on the side of the air. Heres an easy way to figure out which way the air flow arrow goes.
Remember that air flows from your ducts through the filter and into the furnace. By Staff Writer Last Updated March 29 2020. If an air filter is installed in the wrong direction air will have to pass through the filter via the less porous side.
Another way of determining the correct orientation of the filter is that the arrows always point toward the furnace itself.
This means that air will be sucked through the filter before entering the mechanical equipment. Another way of determining the correct orientation of the filter is that the arrows always point toward the furnace itself. The arrow points in the direction the air is flowing through the duct system. Furnace filters have an arrow that point to installation towards the evaporator coil fan and blower.
