This single-phase auto transformer speed controller is designed to provide reliable, stepped control of extractor and supply air fans. It offers a practical solution for managing airflow levels in residential, commercial, and light industrial ventilation systems where stable and quiet operation is essential.
The controller is suitable for use with extract fans, supply fans, and air handling units. By using transformer-based technology, it delivers consistent voltage regulation while avoiding the electrical noise often associated with electronic controllers.
The controller provides five fixed voltage steps, allowing accurate adjustment of fan speed to suit specific ventilation requirements. The first step begins at approximately 40% of full fan speed, with evenly spaced increments to higher output levels.
A range of amperage options is available, enabling correct matching to the connected fan for dependable performance and long-term reliability. The unit is built for professional use, where predictable airflow control is required.
An integrated neon on and off indicator offers clear visual confirmation of operating status, supporting straightforward installation, commissioning, and ongoing maintenance.
Transformer-based speed control eliminates harmonic noise, resulting in noticeably quieter fan operation compared with electronic alternatives. This makes it well suited to occupied spaces where acoustic comfort is important.
Controlled airflow helps manage moisture levels, supporting effective condensation control and reducing the risk of mould growth. Stable fan speeds also improve overall system efficiency and help maintain consistent indoor air quality.
The robust construction and dependable electrical design make this controller suitable for long-term use in professional installations, providing confidence for installers, landlords, and building managers.
This speed controller is suitable for controlling extract and supply air fans in a wide range of settings. Typical applications include kitchen extraction systems, utility areas, plant rooms, and ventilation systems within residential or commercial buildings.
Its ability to operate reliably in humid environments makes it appropriate for areas exposed to moisture, where durable ventilation control is required to meet building performance expectations.
The enclosure is rated to IP54, providing protection against dust ingress and water splashes. This allows installation in demanding environments without compromising safety or performance.