I bought a house built in 1976 in 2009, and it is perpetually dustyMy furnace is in my garage in an enclosed room that is sealed up tight (with exception tof 2 vents with air filters so the furnace is not starved for air)First, we cleaned the entire house, moving all furniture etc to make sure no dust was left anywhere, then bought an quot;attic tentquot; to prevent heat loss/draw that is sealed with duct tape to the ceiling joist around the pull down steps (my theory was the dust was coming from the blown in insulation), I only have carpet in 3 bedrooms that I had professionally steam cleaned, then had the ducts and furnace (which is only 5 years old) cleaned by a reputable company that was NADCA certified (I did as much research as I could), then cleaned the whole house againIt's no better, allergies are still awfulWe even bought new mattresses and furniture which was no helpWhat can I do?
I would check the work done by the duct cleaning companyJust stick your phone and a flashlight into both return and supply ducts and take some videoI would also try to get a picture of the inside of the trunksThe end caps can be poped off letting you look into themIf the cleaning wasn't done correctly it is possible to push all the dust into the trunk making matters worseHow has your air filter been? Does it stay clean for a long time or is it filthy after a month? If it's always dirty it's a sign of a dirty hvac systemDoes the hvac ducts run through the blown insulation of the attic or a dusty crawl spaceIf it does you might need to seal the seams of the return trunks and panningThe furnace could constantly be pulling dust into the system from the cracks and voidsA high quality air filter can also be installedLook for a unit that has a thick filterNot the 1 filters but one that is 4 or thickerI like the aprilare or Spacegaurd.
About as much as the bullshit you just wrote.
