Insulation in vents

Old 09-09-22, 01:06 PM
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Insulation in vents

Hello! My job is located inside a really old house. Recently, we’ve seen little bits of yellow insulation in the vents (they are on the ceiling). Nothing has come through the vents (that we’ve seen or noticed). Is this something we should be really concerned about? It was discovered in 3 of the 5 vents in the building. Just two or three pieces in each. Do we need to clean the ducts? I’ve found various things online…should we be concerned about the air quality in the house? Is it possible the entire place is contaminated with fiberglass? Do we need to clean the entire office space? I have seen things online that say to just do a simple dusting to evacuating the space and bringing in professionals cleaners and throw away all cloth items. Maintenance says that everything in the attic
looks fine and is intact. Thanks for any help/insight.
Old 09-09-22, 03:30 PM
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we’ve seen little bits of yellow insulation in the vents
Duct work can be insulated both internally and externally. Is one better than the other, couldn't say. I'd bet that the fact that your seeing yellow material means it's some type of fiberglass material and as mentioned it's inside the duct work, somewhere.

As a note I have both!

An issue, probably not, a nuisance, probably.

I'd suggest, start poking around the duct work from the furnace to the rooms and see what it looks like, could be just some old duct work that is easy to replace or some duct work with lots of panels attached to the inside that will be a big project to replace!
Old 09-09-22, 03:58 PM
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My first thought would be leftover construction debris...

2nd thought would be the possibilty of mice in the attic or ceiling chewing through flexible ductwork.

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