Ingress to a sylph outpost is achieved through a small airlock between the hangar and living quarters. The purpose of this space is to remove stray ash particles which may remain after doffing Astral Templar armour or other scientific gear, and the mechanism by which this is accomplished is, of course, superior Llyran pipesmithing.

Sylph structures are engineered 'pipes-first' to ensure natural airflow that circulates old air out while letting in new, filtered air. While these passive systems are sufficient for most buildings within Llyri's breathable perimeter, isolated wastebound structures such as outposts are required to be ash-free as a matter of life and death, and thus airlocks leverage the same battery-powered ventilation technology as Templar armour to provide a fan-powered boost to the circulation process. The resulting rush of air more often than not knocks first-time users from their feet.