I just moved into a 30 year old house and am puzzled by something I saw in the attic. At first I thought they were bundles of unused insulation. But then I realized they were boxes (about 2' cubed) that were fixed on the attic floor. They are wrapped in insualtion material, and I believe they are all immediately above recessed light pots in the top floor ceiling below. I've never seen this before. If they are just there to insulate the pot lights, then it seems like overkill!
There is also ducting up there that feeds the top floor vents, and they are insulated in the usual way, with rolled insulation material covering them. The boxes appear not to be related to the ducting.
Anyone seen boxes used like this before?
TIA
Mat