The Ventilation Shaft is a room in the Phazon Mines, in the game Metroid Prime. It consists of a half pipe, where Samus can use Boost Ball to get into a tunnel leading to Elite Control. The first time this room is accessed, Puffers will emerge from vents in the ceiling, filling the air with their meta-viprium gas. This will continue until an Interface Module in the Control Room is scanned and the ventilation fans are activated.