A seat assembly includes an external structure, at least one seating support surface, a valve, and at least one air distribution passageway. The external structure has a cavity therein. The at least one seating support surface is configured for contact with an occupant. The valve is disposed within the cavity and is in fluid communication with an external air supply. The at least one air distribution passageway is in fluid communication with the valve and is interposed between the valve and the at least one seating support surface. Air from the external air supply is directed to the seating support surface via the valve and the at least one passageway.