The air handlers were running 24 7 so the state of the art electronic filters could do their job but running the air handlers only made the problem worse.
Dust from attic insulation.
Another option for loose insulation removal is to rent a hepa filtered industrial vacuum.
White blown fiberglass insulation covered with a heavy level of dust in the attic.
And this is still true when it comes to dust.
These high powered vacuums do two jobs.
Place an air filtration dust mask on your face before you start this step.
Areas of potential air infiltration were observed and noted including the sheet rock chases around the skylights perforations in the recessed lighting fixtures and miscellaneous penetrations.
3 dusting the next step is to clear the dust accumulated in the attic but instead of using a feather duster or cotton cloth which just pushes the dust around i would recommend using a microfiber cloth.
You don t want to be stuck in the corner while stirring up the air with old or damaged insulation or dust from dried rodent fecal matter.
Use your vacuum cleaner to get rid of cobwebs and clumps of dust.
We talk a lot about how the attic matters.
Even with a dust mask or respirator keep exposure to insulation at a minimum.
Most homes in the metroplex have a type of insulation in the attic that turns to dust.
Clear out the junk.
If your attic isn t finished make sure you don t make holes in the insulation.
The dust found its way into the house via duct leakage and pressure imbalances due to door closure.
Most often the dust is due to the type of insulation that s in your attic.