black dirt from vents
I just moved into a 50 year old home. There was a new heating unit put in 7 years ago. An addition was put on in 2004.
Once the old owners moved out, you could easily see where black dirt was sucked into the vents as well as where the vents put out the heat/AC onto the walls. Some areas worse than others.
I was thinking I just needed the ducts cleaned, but after reading up on it, I don't see anyone mentioning being able to see obvious dirt on walls or carpets. It's almost as if someone used a kerosene heater with black oily smoke. There was no mention of a fire at any time in the disclosure.
Any ideas what it is from? Or if duct cleaning is sufficient? Hate to disturb any asbestos like product that may have settled in over the years of remodeling in this house.