Clean air supply is critical in air conditioning.
This is achieved by passing air through an air filter.
Filters capture dust, dirt, fumes, smoke, and bacteria, enhancing indoor air quality.
They are located in air handling units or ductwork and require regular cleaning or replacement.
A grill is merely a cover for air openings, offering no filtration.
A register, an air outlet with a damper, controls airflow but does not clean the air.
A fan circulates air without removing contaminants.
Consequently, the filter is the designated device for air purification.