Active Air Duct Fan Speed Adjuster – Variable Speed Controller for Inline Fans & Ventilation

The Active Air Duct Fan Speed Adjuster gives you full control over your grow room’s airflow by allowing you to fine-tune the speed of your inline duct fans. Whether you need stronger ventilation, quieter operation, or balanced negative pressure, this easy-to-use controller helps optimize your environment with smooth, variable adjustments.

Built for durability and consistent performance, the adjuster works with most Active Air and compatible inline fans. Its simple dial control lets you reduce noise, regulate temperature, and improve overall air circulation—perfect for grow tents, hydroponic rooms, and home ventilation systems.

Key Features:

• Variable speed controller for inline duct fans

• Adjust airflow to fine-tune temperature, humidity & noise

• Compatible with most Active Air inline fans

• Easy dial control with smooth speed transitions

• Helps maintain proper negative pressure in grow tents

• Improves ventilation efficiency and energy use

• Ideal for hydroponics, indoor gardening & home HVAC support