Nov 17, 2012 #1 X XAce New member Nov 17, 2012 0 0 0 I removed the air vent of the AC and heating, at the border of the wall opening there are hairy looking black fibers, seems like a growth. I also found similar in the intake area behind the filter.
I removed the air vent of the AC and heating, at the border of the wall opening there are hairy looking black fibers, seems like a growth. I also found similar in the intake area behind the filter.