Final answer:
Natural ventilation is a type of ventilation system that does not require a compressed air source.
Step-by-step explanation:
The type of ventilation device that does not require a compressed air source is a natural ventilation system. Natural ventilation relies on the movement of air through windows, doors, and other openings in a building, along with the buoyancy effect of warm air rising to create air circulation and exchange without the need for mechanical systems or compressed air.