I recently looked this up in the manual and used it but not in a situation where it would have made any noticeable change… so does it actually make any difference?This. Always charcoal.
Also, If anyone doesn’t know what that dotted flow button does in the menu:
It closes the full time external 20% mix damper and forces full 100% recirc filtering and cleans the cabin air for 3 minutes.
Great for allergies or driving through livestock fields.