Carpet acts as a giant filter, trapping and holding dirt, dust, and all sorts of other pollutants that adversely affect the quality of our in-home (or in-business) air. Wall to wall carpeting can legitimately be thought of as your home’s “bigger-better” furnace filter, catching almost all the particulate (some microscopic) that your in-line furnace filter does not. When these two systems (furnace and carpet) are working properly and being maintained regularly, your in-home air quality can be very good.