Depending on your climate you could have your central heating and air conditioner on for most of the year. Many companies offer a service where they will clean you air ducts. Some people believe that, if there is dust on the furnishings there is probably dust in the ductwork. If you or any of the members of your family have allergies you may want to have someone come over and check out your system. The Environmental Protection Agency (EPA) feels that duct cleaning is warranted but not something that has to be done on a regular basis.
Jane Dixon
