I've got a vent for the driver heater that is always open to air, and can flow through the heater when it is switched to "fresh air". However, in the winter times, it serves no purpose other than drag (why pull fresh air instead of more efficiently heating the interior?).
So I put some duct tape on it, which is working fine, but it occasionally requires re-taping. Was wondering if anyone knows of a cover/plug commercially available or has custom made one and could give me some suggestions?
This is the vent: