The vent system lost pressure with the fan on high, I figured it was time to change the cabin air filter. When I pulled it out it was FULL of leaves and other nest material. The downstream duct was also full. I think the main intake for the vent system should be protected with a screen so critters could not get in. Where is the main duct for the vent system on the 2012 Caravan? I need to screen it because the engineers didn't.

 

Intake duct should be under the windshield and the cowl. You need to remove the cowl to see it.

 

Thank you.