The phrase "air circulation system" is correct and usable in written English.
It can be used when referring to a system designed to move air within a space, often for ventilation or climate control purposes.
Example: "The building's air circulation system ensures that all rooms receive adequate fresh air and maintain a comfortable temperature."
Alternatives: "ventilation system" or "airflow system".
A buzzing, possibly from the air circulation system or from lights, lay over soft moments.
But no sooner had the meteorologists made their prediction than the weather bucked this trend, with a shift in the Atlantic's jet stream air circulation system giving rise to high-pressure weather fronts and a long period of settled sunny weather.
The trade winds of the Pacific represent the eastern and equatorial parts of the air circulation system; they originate in the subtropical high-pressure zones that are most pronounced over the northeast and southeast Pacific between latitudes 30° and 40° N and S, respectively.
It could suggest you open a window, or prescribe more drastic solutions like installing a professional air filter into your home's air circulation system.
Samples using a floor heating system showed higher formaldehyde emission than those using an air circulation system.
The subsystems include air conditioning and water recycle system, air circulation system, water and nutrient delivery system, lighting system and plant monitoring system.
The cavern is filled with sound: metal echoing off stone, the drone of large air circulation systems, and random shouts drifting down from above.
Observed "background" nicotine concentration levels corresponding to 4 to 7% of those encountered in smoking areas demonstrate that central air circulation systems and people movement increase the nicotine level throughout all rooms of a building, regardless of the smoking policies of an individual office complex.
An air-circulation system prevents the animals from smelling either blood "or fear," Dr. Grandin said.
The crew installed emergency masks and lights in the laboratory, hooked up the air-circulation system and computers and executed a few somersaults.
