Originally Posted by
mygirlsdad77
Only reason to blame furnace would be filter selection. Other than that, it is all about housekeeping. Clean carpets, as hvac suggested. Keep windows and doors closed during summer months(to help keep dust out of house). Do you live in the city or in the country. If you live in a dirt surrounded area, dust is going to be a constant problem. You may look into an electronic filtration system. i would suggest loosing the cats too, but that would make me a hypocrit, and my wife would cut my balls if she heard me say that. Anyway, i would look into better filter system for you furnace and see what happens.