Proper airflow control is essential in industrial, commercial, and residential applications to maintain air quality, manage energy use, and reduce noise. United Automation’s Fan Speed Controllers provide accurate and flexible solutions for managing fan speed, ensuring that ventilation systems operate efficiently and reliably.
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🔗 Fan Speed Controllers – United Automation

What Is a Fan Speed Controller?
A Fan Speed Controller—also known as a fan controller or ventilation controller—is an electronic device that adjusts the speed of AC fans and motors. It works by regulating voltage or frequency, enabling precise control over airflow, noise levels, and energy consumption. This is ideal for applications where variable ventilation is required rather than fixed-speed operation.
Key Features & Specifications
United Automation’s fan speed control range includes units with features such as:
- Voltage regulation from 230 V AC
- Adjustable speed levels, typically 10–100% of full speed
- Compact form factor for DIN-rail mounting
- High inrush current protection to prevent motor damage
- Soft-start capability for smoother motor acceleration
- Built-in thermal or overload protection
- User-friendly controls, including potentiometers and digital interfaces
- Available in 1-phase and 3-phase models for varied fan types
These features ensure that fans run efficiently, safely, and quietly across diverse applications.
Fan Controller 4kW 230V
£94.50 ex. VAT
VAC2-2E-RFI 2A, 230V
£57.50 ex. VAT
Applications of Fan Speed Controllers
1. Industrial Environments
- Ventilation in factories and workshops to regulate air quality and remove fumes
- Dust extraction systems where precise airflow is essential for filtering efficiency
- Cooling fans for electrical cabinets and control systems to maintain optimal operating temperatures
2. Commercial Buildings
- HVAC systems in offices and retail spaces, allowing tailored airflow and lower energy usage
- Kitchen extractors and ventilation for restaurants to manage odours and heat
3. Residential & Small Business
- Attic, basement, and garage ventilation to improve air circulation and reduce humidity
- Server rooms and home-office setups where stable cooling supports equipment lifespan
4. Grow Rooms & Greenhouses
- Adjusting circulation fans to maintain constant temperature and humidity for optimal plant growth
Who Benefits from Fan Speed Controllers?
- HVAC technicians improving existing ventilation setups
- Facility managers looking to enhance air quality while reducing energy costs
- Industrial electricians needing compliance with airflow regulations
- Catering and restaurant owners wanting quieter extraction systems
- Growers and horticulturists seeking environmental control in greenhouses
- Homeowners upgrading natural ventilation systems
If you’re interested in reducing energy usage, achieving quieter operation, and gaining better control over airflow, a fan speed controller is an ideal solution.
Why Choose United Automation’s Controllers?
Founded in the UK, United Automation specialises in industrial-grade power control solutions. Our Fan Speed Controllers offer:
- 🇬🇧 British-built resilience and superior electrical design
- Industry-standard safety protections for motor and user safety
- Flexible control options, from manual potentiometers to full automation
- Compact design for simple installation and retrofit applications
- Technical support and customisation to suit your specific needs
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🔗 Fan Speed Controllers
Enhancing Airflow Efficiency & Noise Reduction with Fan Speed Controllers
Reducing fan speed can dramatically lower energy use: a fan operating at 50% speed often uses just ~25% of its full power. Feedback from clients shows that our controllers have reduced energy consumption by up to 30% and lowered noise levels significantly, improving working and living environments.
Final Thoughts
Tight control over ventilation and airflow can improve air quality, reduce energy usage, and enhance comfort. United Automation’s Fan Speed Controllers offer the flexibility, safety, and efficiency needed for modern fan control systems.
👉 Ready to optimise airflow and save energy?
Visit: 🔗 United Automation Fan Speed Controllers