We were having the same problem year after year with dust in our home and no matter how much we cleaned, the dust would begin to accumulate. We changed our home air filters regularly, but to no avail.
Finally we saw the ad in the newspaper for Air Supply and called. An appointment was made and Shawn came to clean our ducts and check our heaters. The biggest thing was cleaning our dryer vent; it was almost completely plugged. Dryer fire avoided. That being taken care of, the next big improvement made was installing electrostatic filters.
All in all we had a great experience with Air Supply. Shawn was very personable and answered all our questions. Thanks to their help we will now be able to breath cleaner air and not have the heavy dust problem.