Front grill filter

Hope you’re right. The difference, as I see it, in the AC system or the engine air breather, the air is pulled through the filter by the AC fan or pistons, and as the filters get dirty it affects airflow. In both cases there is no other way for air to enter the system. In your situation there is not that forced pulling affect through the material.

But I could be wrong, and again hope you are right.

I remember reading a post somewhere could have been on another forum, someone did a similar upgrade on a Jeep but used screen door material and started getting over heating situations.