WindowMaster WMD 820-1G OUT Folding Arm Actuator
Available in stock
The WindowMaster WMD 820 is a robust folding arm actuator engineered for side-hung windows and doors requiring 90-degree opening capability. Ideal for both inward and outward opening applications, this actuator delivers reliable automated operation for smoke ventilation and emergency egress systems. Built to professional standards, it ensures consistent performance in demanding commercial and institutional environments.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
| Specification | Details |
|---|---|
| Traction Force on Arm Roller | 250 N |
| Locking Force | 2000 N |
| Maximum Opening Angle | OU 90° / IN 98° |
| Opening Speed | < 60 sec |
| Window & Door Types |
Side hung windows & doors – Vent or door size should be confirmed with both the window supplier and WindowMaster |
| Nominal Voltage | 24 VDC (max. 10% ripple) |
| Voltage Range | 20 – 36 VDC |
| Open Circuit Voltage | Max. 36 VDC |
| Potential Free Output | F version, 18Ω, max 100 mA |
| Current Consumption | Max. 1 A |
| Electronic Lock | S version, max 1 A |
| Power Consumption | Max. 24 W |
| Operating Conditions | -5°C to +74°C, max. 90% relative humidity (non-condensing) |
| Switch-on Duration | ED 40% (max. 4 min per 10 min) |
| Material | Anodised aluminium housing with stainless steel chain |
| Cable | 5 m grey silicone cable, 5 cores, 0.34 mm² |
| Colour | Anodized aluminium. RAL colours available at additional cost |
| Size |
34 × 76 mm (H × D) Length: 668 mm – 688 mm (incl. brackets) Depth: 81 mm (incl. arm roll) |
| Weight | 3.5 kg |
| IP Rating | IP32 |
| Fire Test | B300 tested according to EN 12101-2:2003 |
| Life Span | Tested with 10,000 opening and closing movements |
| Delivery Includes | Actuator with 5 m cable |
| To Be Ordered Separately | Brackets |
| Note | We reserve the right to make technical changes |
Discover more in our FAQ
Our commitment to technical excellence and exceptional customer service has made us a trusted name in the industry. For professional guidance on your ventilation project, contact us today.
What is an actuator on a window?
What is an actuator on a window?
A window actuator is a device installed on a window that allows it to open and close automatically, eliminating the need for manual operation. They are ideal for hard-to-reach windows and rooflights, multiple windows that need to operate simultaneously, or buildings aiming to take advantage of automated windows and enhanced natural ventilation.
What are the key types of window actuators?
What are the key types of window actuators?
- Electric Chain Actuator: Pushes/pulls the window using a chain; good for medium-sized windows; smooth and quiet.
- Linear/Spindle Actuator: Uses a screw-like spindle to extend/retract; precise and robust; supports heavier windows.
- Folding Arm Actuator: Uses a hinged arm to swing the window open; allows wide openings; good for heavy or outward-opening windows.
What to consider when choosing a window actuator?
What to consider when choosing a window actuator?
When selecting a window actuator, keep the following in mind:
- Window Type & Size - Make sure the actuator is suitable for the window's design, dimensions, and weight.
- Force Requirements - Choose an actuator capable of providing enough force for smooth and reliable operation.
- Voltage & Power Supply - Decide between 24V or 230V options depending on your building's electrical setup.
- Mounting & Aesthetics - Consider available space and how visible the actuator will be.
Who can install a window actuator?
Who can install a window actuator?
Window actuators, used for high-level windows or roof vents, can be installed by qualified professionals such as window automation specialists, automated ventilation technicians, glaziers, or electricians.
