Just moving into a home you bought from someone else? Are you putting a fresh coat of paint on the walls, new floor coverings, wall paper? Buying that new house is a big investment; you spend time and money making that house which was once someone else’s yours. You try to remove any and all remains of the past owners, but by tearing out the flooring, changing the wall paper, and paint colors are you accomplishing this? What about your home comfort system? Did the past owners maintain it well? Or did they neglect the home comfort system by not changing the filter like they should? Poor filter maintenance, leads to dirty home comfort systems, which leads to dirty duct work. What is in your duct work? Did the previous owner smoke, have a house pet, did they maintain the total comfort system.