I keep a pretty close eye on our central HVAC unit (located up in the attic), and vacuum-clean the coils, check for leaks, etc. myself. The last year or so, however, especially if it's been off for a day or two, when it first comes on, little flakes of medium-brown paper, the biggest about like the end of a pencil, come down from some of the vents, about 10-20 pieces over a period of an hour. They're very thin and brittle.
Can anybody tell me what this is and where it might be coming from? I can't see anything like that in the central unit.
Thanks, Ron M. email@example.com