Forced air systems, ducts that carry hot or cooled air throughout the home are often present in bonuses or other un-conditioned places where the temperatures are completely different from those in the air in the ducts. These temperature differences can affect the temperature of the air passing through the channels and increase the costs of heating and air conditioning. The insulating channels in the undesirable areas of the house can help reduce the costs of heating and cooling energy and improve the comfort in enclosed spaces in humid climates. It is also true to reduce the condensation of moisture on the metal channels