Bad, I suppose, if any motor has to run full speed all the time. It's life is shortened.
Is a shrouded fan spinning away suffering? It's not like filling a blender with rocks and turning it on.
However, is a degree of airflow needed for cooling of the fan itself?
So many posts mention, "straining the motor if the CAF isn't clean", but nobody explains why.
I've been Googling about burning the fan motor out. I found one site that said it probably won't affect the motor because...said something about resistance and blah blah. But then all the other sites talk about clogged filters possibly shortening the life of the motor because it is working harder. Well, obviously this filter seems to be the equivalent of a clogged filter given air doesn't seem to move through it. Aside from a higher fan speed wearing a motor faster will the added resriction of air shorten it's life? Let's assume I drove with my fan on speed 4 with a normal air filter all the time and speed 4 with this and just accepted my car being hotter. Will the filter airflow restriction itself cause issues other than annoyance? So another way of asking, if I'm ok driving in a sweatmobile, because the cleaner air means a lot to me, is the airflow struggle going to kill my HVAC system?