|"Did you receive the memo?"|
Air Vent 3 is the air vent that Maxie and George crawl through on their way downstairs.
Air Vent 3 is an air vent with a X-patterned metal plating pattern. It leads from Air Vents 1 and 2. It also connects to Air Vent 4. Despite looking flat the back of the vent it is actually just a corner.
During gameplay, George and Maxie will crawl through this vent (one by one) to get to the Security Office. You can't stop them from going past this vent due to a lack of vent covers. Vent animatronics will take time to get from Air Vent 1/Air Vent 2 to this vent.