Drywall dust particles can remain suspended in the air for an extended period, depending on various factors such as ventilation, air circulation, and the size of the dust particles. Generally, drywall dust is quite fine and lightweight, which allows it to stay airborne for an extended period. Here are some key factors that can affect how long drywall dust remains in the air:

1. Air Movement: The movement of air within a space can affect the duration of suspended drywall dust. Proper ventilation and air circulation, such as through open windows, fans, or HVAC systems, can help disperse the dust particles and reduce the amount of time they remain in the air.
2. Particle Size: The size of drywall dust particles can vary, with some being larger and heavier than others. Heavier particles tend to settle more quickly, while finer particles can remain airborne for longer periods.
3. Humidity Levels: High humidity levels in the environment can cause drywall dust particles to clump together, making them heavier and more likely to settle. Lower humidity levels, on the other hand, can allow the particles to stay suspended for a longer time.
4. Cleaning and Containment Measures: Taking appropriate cleaning and containment measures can help minimize the duration of drywall dust in the air. Using dust containment systems, such as plastic sheeting or barriers, and employing effective dust control measures during construction or renovation can help reduce the amount of dust released into the air.

While drywall dust may remain in the air for a period of time, it eventually settles onto surfaces. Regular cleaning, including dusting and wiping down surfaces, can help remove settled dust particles and maintain a cleaner environment.