WML 825 Smoke Ventilation Chain Actuator

Smoke ventilation chain actuator for VELUX swing windows GGL, GGU from size F06 and VL from size 033.

The operator can be connected directly to the WindowMaster smoke ventilation control units WSC 3xx and WSC 5xx.

Categories: , ,


  • The product is suitable for comfort ventilation to ensure that the building’s users enjoy a comfortable indoor climate
  • The product is suitable for smoke ventilation and use natural driving forces for the efficient exhaust of smoke and heat
View Product Brochure
Technical specification
Stroke Max. 540 mm
Nominal voltage 24V DC
Current consumption 1A
Size 520 x 30 x 87mm (WxHxD)
Colour Grey (RAL 7004)