
Window Master WWS 100
WindowMaster
WindowMaster WSK 397 Replacement Breakglass (Pack of 5)
WindowMaster
WML 825 for VELUX Windows
WindowMasterColour/Finish GreyMax Current (amps) 1 
WMU 836 03 for VELUX Windows
WindowMasterStroke (mm) 600 Max Force (N) 300 Colour/Finish Anodised Aluminium
Max Current (amps) 1 
WMU 861 – 600N Chain Actuator
WindowMasterStroke (mm) 300, 500 Max Force (N) 600 Colour/Finish Anodised Aluminium
Max Current (amps) 1 
WMU 862 – 600N Chain Actuator
WindowMasterStroke (mm) 300, 500, 600, 750, 1000 Max Force (N) 600 Colour/Finish Anodised Aluminium
Max Current (amps) 2 
WMU 863 – 600N Chain Actuator
WindowMasterStroke (mm) 600 Max Force (N) 600 Colour/Finish Anodised Aluminium
Max Current (amps) 3 
WMU 864 – 600N Chain Actuator
WindowMasterStroke (mm) 750, 1000 Max Force (N) 600 Colour/Finish Anodised Aluminium
Max Current (amps) 4 
WMU 882 – 1000N Chain Actuator
WindowMasterStroke (mm) 300, 500, 600, 750 Max Force (N) 1000 Colour/Finish Anodised Aluminium
Max Current (amps) 2 
WMU 883 – 1000N Chain Actuator
WindowMasterStroke (mm) 300 Max Force (N) 1000 Colour/Finish Anodised Aluminium
Max Current (amps) 3 
WMU 884 – 1000N Chain Actuator
WindowMasterStroke (mm) 500, 600, 750, 1000 Max Force (N) 1000 Colour/Finish Anodised Aluminium
Max Current (amps) 4 
WMU 885 1000N Chain Actuator
WindowMasterStroke (mm) 750, 1000 Max Force (N) 1000 Colour/Finish Anodised Aluminium
Max Current (amps) 5
Smoke Ventilation
We supply reliable, EN12101-2 tested WindowMaster smoke ventilation actuators such as the WMU 842 and WMU 836, designed to ensure safety, performance, and compliance. Our EN12101-10 control panels include the WSC-104 for single-zone stairwells, and multi-zone FlexiSmoke panels like the WSC-520, WSC-540, and WSC-560 for larger smoke ventilation systems. We also stock the WindowMaster WSK 501, a widely used break glass unit for smoke ventilation systems.
Natural Ventilation
Our natural ventilation solutions include compact, efficient actuators like the WMX 804 and control panels such as the WCC-103, WCC-106, WCC-310, and WCC-320. These systems are designed to improve airflow and energy efficiency across a variety of building layouts.
The WindowMaster range is also often integrated into BMS (Building Management Systems) for more advanced ventilation control requirements.

