Insulation behind air vent (Possible mold)
I live in the Houston area and have a 1975 two story home. I have noticed a very small amount of mold on the vents. After further inspection the mold is only on the downstairs vents. Also all of the downstairs vents have what looks like insulation right behind the vent. There is a round duct that is bare sheet metal and where the round duct transitions to the square vent there is the insulation material. The insulation is very nasty and blackish grey in color.
Why is there insulation behind the vents and why only downstairs?
Is the insulation causing the mold?
If i dont see any mold in the sheet metal duct can I assume it is only right at the vent? (I do have a access to a bore scope so I plan on looking as far as I can into the duct)
Thanks in advanced for any information on the issue.
Please stick to one thread or the other. Doubling up is frowned upon.
Do not attempt vast projects with
half vast experience and ideas.
Sorry for double posting... I think this issue belongs in the location and I did not know how do get rid of the other post.
You asking if I burn candles. Yes we do but the insulation has been black since we moved in.
What is the purpose of the insulation and can I remove it?