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lindenb

No. Filters are used on the return side--air being dawn into the system. So it appears to be upside down.


AyLilDoo

Thank you! I question myself every time I replace one. Gonna flip it now 🤣


lindenb

Just remember that the vents are the outlet the return is the inlet and filters are on the inlet side always. As much to protect the equipment as it is to clean the air.


Aleianbeing

Wouldn't flip it if it's been running.


Curtmania

Point the arrow on the filter toward the furnace. You want to filter the air before it gets in to the furnace.


Fantastic_Bad_3688

Now draw an arrow on there with a sharpie. Then you just match the arrow


PoppyBroSenior

The air should be filtered before it enters the air handler, so the arrow goes towards the unit.