An inline fan is a ventilation device used in grow tents to move air in or out of the space.
WHAT ARE INLINE FANS?
Inline fans are cylindrical fans designed to be connected to ducting. In grow tents, they are most often used to exhaust hot, humid air and pull in fresh air through intake ports.
They are commonly paired with carbon filters for odor control.
HOW THEY’RE USED
Growers use inline fans to:
- Regulate temperature
- Control humidity
- Maintain fresh air exchange
- Create negative pressure inside the tent
Inline fans can run continuously or be controlled by timers or environmental controllers.
WHY IT MATTERS
Inline fans matter because:
- Plants require constant airflow and fresh CO₂
- Heat and humidity buildup can cause stress or mold
- Proper ventilation stabilizes the entire grow environment
Without an inline fan, most grow tents quickly become unmanageable.
LIMITATIONS / NOTES
Fan size should match tent size and ducting diameter. Oversized fans may require speed control to prevent excessive negative pressure.