The phrase "air ventilation system" is correct and usable in written English.
It can be used when referring to a system designed to circulate and manage air within a building or space, often for heating, cooling, or air quality purposes.
Example: "The air ventilation system in the office was upgraded to improve air quality and energy efficiency."
Alternatives: "air circulation system" or "ventilation apparatus".
Considering what the men had at their disposal, the three 9 metre-deep tunnels were technological marvels, featuring electric lighting, a railway and an air ventilation system.
At the desks where the craftsmen work, an air ventilation system set at both sides of the table sucks air off the surface.
The tunnel, which contains a hydraulic lift, electric lighting, and a makeshift air ventilation system, is thought to have been in use for some time.
After understandable criticism of air-quality reports by the Environmental Protection Agency in 2001, the agency oversaw the creation of decontamination rooms, plastic sheeting and an air ventilation system designed to keep air inside the building.
According to the South China Morning Post, 40 top athletes and coaches were forced to withdraw from competition in January after contracting influenza through a dirty and poorly maintained air ventilation system.
(a) The Cinestar Cinema in Mainz, Germany, (b) The 230 seat capacity cinema audioreum, (c) the air ventilation system, (d) insertion of the Teflon inlet into the 75 × 75 cm ventilation system.
Mixing air ventilation systems are currently used in commercial aircraft environmental control systems (ECS), which are essential for creating a healthy, thermally comfortable and energy-efficient cabin environment.
CFD results indicate significant improvements over conventional mixing air ventilation systems with a 40 50% decrease in passenger exposure predicted in a conventional coach-class seating arrangement.
The scientists were keen to discover whether 'long distance travel of aerosols' in the tube network 'was due to transportation within trains' or through the tube's air ventilation systems.
Results of a previous computational fluid dynamics (CFD) study indicate significant improvements over conventional cabin mixing air ventilation systems with an average decrease in passenger exposure to body-emitted contaminants upwards of 60% predicted.
