Variispeed Fan Controller UK | Manual Speed Controller for Grow Room Fans
The Variispeed Fan Controller is a reliable manual fan speed controller designed for grow rooms, grow tents, and hydroponic ventilation systems. Ideal for adjusting extractor fan speeds, reducing airflow noise, and improving environmental control, Variispeed controllers provide simple and effective airflow management for inline extraction systems.
- ✔ Manual grow room fan speed controller
- ✔ Adjustable airflow control for extractor fans
- ✔ Helps reduce fan noise and airflow levels
- ✔ Easy plug-and-play operation
- ✔ Compatible with many AC inline extractor fans
£9.99 incl. Vat
7 in stock
🌬 Variispeed Fan Controller Guide & Product Information
🌱 Simple & Effective Grow Room Fan Control
The Variispeed Fan Controller is a straightforward and reliable manual speed controller designed for controlling inline extractor fans in grow rooms, grow tents, and hydroponic ventilation systems.
By allowing growers to manually adjust extraction fan speed, the Variispeed controller helps create more stable environmental conditions while reducing unnecessary fan noise and excessive airflow. This makes it ideal for growers looking for a simple and cost-effective way to improve ventilation management inside indoor grow spaces.
Controlling extractor fan speed is important for maintaining stable temperatures, humidity levels, and negative pressure while also helping reduce energy usage and fan noise during cooler periods.
If you are improving your extraction setup, read our guide to proper grow room ventilation.
- ✔ Simple manual airflow adjustment
- ✔ Helps stabilise grow room environments
- ✔ Reduces unnecessary extraction noise
- ✔ Ideal for hydroponic grow rooms and tents
🌀 Adjustable Fan Speed Control
The Variispeed Fan Controller allows growers to manually increase or decrease extractor fan speed depending on environmental conditions inside the grow room.
During cooler periods, full extraction power may not be necessary, and reducing fan speed can help:
- ✔ Reduce fan noise
- ✔ Lower airflow turbulence
- ✔ Improve temperature stability
- ✔ Reduce unnecessary energy usage
When grow room temperatures increase, the controller can quickly be adjusted to increase airflow and improve extraction performance.
🔇 Reduce Fan Noise & Airflow Turbulence
One of the main benefits of the Variispeed Fan Controller is reducing operational noise from grow room extraction systems.
Running extraction fans at maximum speed at all times can create unnecessary noise and airflow turbulence. By lowering fan speed when full extraction is not required, growers can create quieter and more comfortable grow room environments.
This is especially beneficial when using:
- ✔ Acoustic extractor fans
- ✔ Carbon filter extraction systems
- ✔ Grow tents in indoor living spaces
- ✔ Long ducting ventilation systems
⚡ Compatible Fan Systems
The Variispeed Fan Controller is compatible with many AC inline extractor fans used in hydroponic grow rooms and grow tents.
Compatible with:
- ✔ Systemair RVK fans
- ✔ Mixed-flow inline fans
- ✔ Acoustic extractor fans
- ✔ Standard grow room extraction systems
Always ensure the fan controller is suitable for the connected fan load and motor type before installation.
🌬 Benefits for Indoor Growing
Proper extraction control is essential for maintaining healthy grow room conditions. The Variispeed controller helps growers create more stable environments by allowing manual airflow adjustment.
Benefits include:
- ✔ Improved grow room temperature control
- ✔ Reduced humidity fluctuations
- ✔ Reduced extraction noise
- ✔ Better carbon filter airflow management
- ✔ Improved environmental consistency
🔧 Easy Plug & Play Installation
The Variispeed Fan Controller is designed for simple setup and operation.
- ✔ Plug extractor fan directly into the controller
- ✔ Connect controller to mains power
- ✔ Adjust fan speed using the manual dial
- ✔ Suitable for grow tents and larger grow rooms
For best performance, pair with Systemair RVK fans, carbon filters, acoustic ducting, and quick release clamps.
❓ FAQ
What does the Variispeed Fan Controller do?
It allows manual adjustment of extractor fan speed to help control grow room airflow and reduce noise.
Can it reduce fan noise?
Yes, lowering fan speed helps reduce motor noise and airflow turbulence.
Is it compatible with RVK fans?
Yes, the Variispeed controller is compatible with many AC inline extractor fans including Systemair RVK models.
Does it automatically control temperature?
No, this is a manual controller designed for direct airflow adjustment rather than automatic environmental management.
Can it be used in grow tents?
Yes, it is ideal for grow tents, hydroponic systems, and indoor grow rooms.

