Dirt, dust and debris can accumulate over time in your home and ductwork. Or, your system may be brand new and need construction debris removed. Whichever the case, you can count on Tennant Duct Cleaning to provide a professional heating and air conditioning duct cleaning service and consultation. Most household dust comes from outdoor dust, whether tracked in or blown through windows or doors. Human skin and hair, pet debris, fibres from carpets, clothes and bedding also contribute to dust production in your home or office. In fact, even as you walk around in your house you raise a small cloud of dust particles wherever you go.