
Concealed chain actuator for VELUX GGL, GGU and VL roof windows. 100N thrust, stroke up to 570mm, 24V. Hidden behind the ventilation flap when the window is closed.
- 100N / 10kg
- up to 570mm
- 24V
- Grey
- Sync option: No
WindowMaster Window Actuators, Trade Supplied Since 2000
WindowMaster is a Danish manufacturer, listed on Nasdaq First North Copenhagen, with its head office in Denmark and further offices across the UK and Ireland, Germany, Switzerland, Norway and North America. The company focuses on automated facade solutions for natural ventilation, mixed-mode ventilation, and smoke and heat ventilation. Vent-Trade has supplied WindowMaster actuators since 2000.
The range covers spindle, chain, locking, louvre and door actuators, wired either on standard 24V circuits or the company’s own MotorLink communication protocol. WindowMaster also supplies the sensors, keypads, break-glass call points and cabling that go with a ventilation control system.
Spindle actuators handle heavier loads, such as large rooflights, but the mechanism can project into the room when the window is closed. Chain actuators suit the same heavy-duty jobs with a neater, less obtrusive look when shut, which is why Vent-Trade stocks both types depending on the application.
WindowMaster references EN 12101-2 for its smoke and heat exhaust ventilation actuators, and supports LEED, BREEAM and DGNB green-building assessments with Environmental Product Declarations for its products. Obstacle detection lets an actuator sense resistance and reverse automatically, and actuators can report position and fault status back to a building management system.
Reach for WindowMaster on sustainability-led projects. Its actuators carry Environmental Product Declarations and support LEED, BREEAM and DGNB assessments, and obstacle detection lets an actuator sense resistance and reverse automatically rather than force through it. Both count for more on schools, healthcare and public buildings than on a straightforward commercial fit-out. Call 01202 725 689 or browse the range below.

Concealed chain actuator for VELUX GGL, GGU and VL roof windows. 100N thrust, stroke up to 570mm, 24V. Hidden behind the ventilation flap when the window is closed.

Surface-mounted chain actuator with micro controller. Up to 300N thrust, 400 to 1000mm stroke options, 24V. Up to four actuators per window with no external sync module.

Programmable aluminium-cased chain actuator. Up to 200N thrust, 50 to 500mm adjustable stroke, 24V. Synchronises up to four actuators with no external module.
WindowMaster is a Danish manufacturer listed on Nasdaq First North Copenhagen, with its head office in Denmark and further offices in the UK and Ireland, Germany, Switzerland, Norway and North America.
Spindle actuators suit heavier loads such as large rooflights, but the mechanism can project into the room when the window is shut. Chain actuators handle similar loads with a neater, less obtrusive look when closed.
Vent-Trade has stocked and supplied WindowMaster actuators to UK trade customers since 2000.