The Airflow Tile can be found in the Base category. It becomes available through Research of Gas Piping and is can be a component of the ventilation system. It can be used as floor or wall piece. Electrical wires or gas or liquid pipes can be placed inside the tile and remain accessible for Duplicants.
The Airflow Tile allows gases and light to pass through but completely blocks liquids, plants, creatures or Duplicants. If gases condense inside the Airflow Tile due to the temperature the liquid gets stuck inside the tile.