duct system, used in air heating and air cooling your home, is a
collection of tubes that distributes the heated or cooled air to the
various rooms. This system can make a big difference in both the
cost and the effectiveness of heating and cooling the home. The duct system
can have an important affect on health of the occupants through the
distribution of indoor air pollution. Changes and repairs to a duct
system should always be performed by a qualified professional.