Actuators

An actuator is an electromechanical device that moves or controls a mechanism or system. In the context of building automation and smoke control, actuators are typically used to automatically open and close windows, vents, or louvres. Powered by electricity, they convert electrical energy into precise linear or rotary movement — providing intelligent control over airflow and smoke ventilation in modern buildings.

Actuators are used for automated ventilation, smoke extraction, and natural cooling. They're installed in Smoke ventilation systems (as required by Approved Document B and BS EN 12101-2), Environmental ventilation systems (to improve indoor air quality) and Everyday building automation (automatically opening high-level windows or roof vents).

In emergencies, they play a critical role by quickly clearing smoke, giving occupants time to escape and firefighters access to contain the blaze.

The most widely used type — and our bestselling model — is the electric chain actuator, like the TOPP ACK5 Chain Actuator – 400mm. This compact, high-performance unit delivers reliable, smooth motion and is ideal for both natural ventilation and smoke vent applications. It's easy to integrate with fire alarm systems, control panels, or Building Management Systems (BMS).

Other common types include:

• Linear actuators – ideal for vertical stroke movements

Twin chain actuators – suited for larger or heavier vents

Actuators are used in any building where automated control of airflow or emergency smoke ventilation is required. Common applications include:

• Commercial offices and retail spaces
• Schools and universities
• Apartment stairwells and corridors
• Warehouses and data centres
• Green buildings and passive ventilation schemes

They’re often installed in roof hatches, high-level windows, AOVs (Automatic Opening Vents), and louvres, where manual operation is impractical.

The primary advantage is automated, controlled airflow — whether for everyday ventilation or emergency smoke extraction. This improves building safety, occupant comfort, energy efficiency, and regulatory compliance. Actuators reduce the need for manual intervention, enable integration with fire and environmental systems, and ensure reliable, repeatable operation in critical scenarios.

With models like the TOPP ACK5, you benefit from:

• Compact, robust design
• Low noise operation
• Easy BMS integration
• Compliance with UK smoke and environmental regulations