These doors are an important part of the ventilation system.
They steer me toward what looks like an ad agency's conference room—featuring exposed concrete and ventilation systems.
A television murmured somewhere down the hall, and a ventilation fan thumped in a nearby window.
ventilation ven·ti·la·tion (věn'tl-ā'shən)
The replacement of fresh air or gas for stale or noxious air or gas in a space.
Aeration or oxygenation, as of blood.
The verbal expression of feelings or emotions in psychotherapy.