Cabin Air Filter Direction Of Airflow

Ok here is a stupid question and yes i know this is only 1 wrench if that.

Cabin air filter direction of airflow.

This side up is simple as can be. The toyota filters being for specific case can use the tsu label aftermarket not so much. This makes sense as the air is drawn in from the base of the windshield through the filter and to the fan. If you take out the installed filter the dirty side is on top so that implies that the airflow is down.

If you install your filter in the wrong direction air will have a hard time flowing through the filter s material and your air handler will have to work overtime to make up for the loss of airflow. Hence look at the label of the new filter and see whether the arrow is for airflow or just direction and install accordingly. Should it point down like in the picture below which is what i got from the diy b6. Airflow direction requires waay to much sleuthing.

But if the filter has arrows indicating the air flow direction then the arrows have to point down. If the air filter has arrows that say this side up then the arrows should point up. I might just change the cabin and engine air filters on ours it s coming up on 10 years this fall. The thing that i have is which way is the direction of the air flow or should the arrow point.

Cabin air filter i have a 2010 camry. The oem filter has direction arrows pointing up. Looks like the air flows downward because my old filter had all the dirt on the top side of the filter.