What actuator do I need for my window?

Stairwell ventilation can be achieved by automatically opening a window within the stairwell. As always this is subject to the minimum free area being achieved when calculated using the method in diagram C7 of Approved Document B.

It is recommended that bottom hinged outward opening windows are selected for efficient smoke evacuation, however this is not a requirement of ADB. Stairwell ventilators are more commonly used for replacing fresh air in a lobby extract system.

A variety of actuators are available for different window types depending on what the required free area is.

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It's all about the window actuator: Everything you need to know

What is a window actuator?

An actuator is a type of motor for moving or controlling a mechanism or system. It is operated by a source of energy, usually an electric current, hydraulic fluid pressure or pneumatic pressure. It then converts that energy into motion. In building services engineering there are two types of actuator commonly used;

  1. Valve actuators for controlling valves within BMS systems 
  2. Actuators for controlling ventilation equipment or automatic opening windows
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