Vault vent covering

The Vault vent is a type of vent used in the Vault-Tec Vaults. It is a large circular covering with five slats. Vault residents use these vents for circulating air. They are a component of the life support systems. The vents are located in every corridor segment.

Vault 101
On August 3, 2274, Andy can be seen repairing a Vault vent.