Fresh air intake and distribution in a swine ventilation system is critical to providing a good environment for animals, but can have a negative impact on building longevity with certain designs. Air generally will flow into the attic to supply fresh air to the production room ceiling air inlets. A typical design brings air into the attic through soffit intakes at the eave. However, this design can negatively impact the building by contributing to corrosion and deterioration of metal.