So I have been battling air quality issues since moving in. Working on getting humidity under control. I had air samples taken to look for mold which I had but it also nonoted that there was significant insualtuon particles in the air of all three levels. I have all metal supplies and returns and all are insulated. I am thinking perhaps there is a break in the line somewhere. My allergies are way worse when the AC is running. I'm trying to figure out where to start looking. If the supplies had leaks wouldn't air push out instead of bringing insulation into the airflow? If it was a return woukdnt the air filter catch most of that? Just trying to figure out the best way to handle this since most of the supples are above a sheetrock ceiling. Thanks for any input.