HEINDA Double chain window opener
- Brand

- TypeAutomatic smoke exhaust window
Double-chain electric opener with smart control, ideal for large or heavy windows.
Overview of the HEINDA Double Chain Window Opener
The HEINDA double chain window opener is a modern solution designed for large-scale automatic smoke exhaust window systems. Featuring a durable double-chain motor design, outstanding load capacity, and multiple intelligent control modes, the product is particularly suitable for large or heavy windows. This device plays a vital role in ventilation and emergency smoke extraction systems, ensuring building safety while also supporting flexible daily operation.
Features of HEINDA Double chain window opener
HEINDA KC-LTS Electric opener for windows is a window fitting that combines energy management, security, building automation and design. In this way, windows become an integral part of intelligent buildings and contribute significantly to unlocking the energy potential of the building envelope.
- Window widths up to 2.5m, even with triple glazing, for maximum transparency and design freedom
- Opening strokes down to 300 mm and up to 1000 mm (customizable), ideal for night cooling or hybrid ventilation
- Multiple operation and control options such as push-button, remote control, smart APP and sensors up to the central control unit
- A great solution for Automatic Window Opening Systems. Improving natural vent with High Windows.
- Applicable on Top Hung Windows, Bottom Hung Windows, Side Hung windows Mid-hung windows Skylight and Sliding windows.
- Ultra-quiet operation, recommended as an automatic window opener for schools, homes or health centers.
- Double link chain made by stainless steel. More stable and smooth.
- Housing made by aluminum alloy in which the surface is treated by anti-cathode oxidation. Greatly improves the rigidity and anti-corrosion.
- The motor is a built-in overload protection system.
Installation Method

Installation process of HEINDA double chain automatic smoke exhaust window opener
The installation of the HEINDA double chain automatic smoke exhaust window opener should be carried out by a professional technical team. Sonha Auto provides full-package services including consultation, on-site survey, and installation, ensuring optimal system performance and compliance with safety standards.
Practical applications
- High-rise buildings, apartments, hotels & resorts: Equipped with durable stainless-steel double chains, the HEINDA motor ensures stable operation of emergency smoke exhaust systems, enhances natural ventilation, and helps save energy in living spaces.
- Factories & industrial zones: With powerful push/pull force and overload protection mode, the device guarantees reliable opening and closing of windows in harsh environments, helping to reduce smoke concentration and improve air quality in production areas.
- Schools, hospitals, shopping malls, airports: Smooth operation with intelligent control via push button, remote, or sensor ensures safety, convenience, and eco-friendliness in crowded public spaces.
- Modern villas & townhouses: Featuring a compact design with an anti-oxidation aluminum alloy casing and flexible opening stroke, the product not only maintains architectural aesthetics but also brings comfort and sophistication to homes.
- Versatile applications: Suitable for various types of windows such as top-hung, bottom-hung, side-hung, skylights, or sliding windows, making it adaptable to diverse architectural designs.
Consultation & quotation
The HEINDA double chain automatic smoke exhaust window opener is the ideal choice for projects requiring reliable, intelligent, and safe operation. With years of experience in supplying and implementing automatic window and door solutions in Vietnam, Sonha Auto is committed to delivering genuine products, professional technical services, and transparent warranty policies.
- 📞 Hotline: 093 645 6008
- 📧 Email: sales@sonha.com
- 🌐 Website: https://sonha.com
| Specification Parameters | |
|---|---|
| Thrust and pull (N): | 1200 |
| Mechanical locking function: | √ |
| Locking force (N): | 3000 |
| Running speed: | 5 |
| Stroke length (mm): | 100-800 (Customized) |
| Multi point lock linkage: | √ (Optional) |
| Output mode: | Screw |
| Maximum window width: | 1.5 |
| DC motor: | √ |
| Minimum window width: | 0.5 |
| Single control switch function: | √ (Optional) |
| Rated voltage: | DC24 |
| Electric push control function: | √ |
| Rated current: | 1.7 |
| Overload protection function: | √ |
| Rated power: | 40W |
| Built in synchronization function: | √ (Optional) |
| Protection level: | IP54 |
| Two level control of fire fighting linkage and daily ventilation: | √ |
| Opening Stroke and Machine Length | ||
|---|---|---|
| Production model | Opening stroke (mm) | Machine size (mm) |
| KC-LG-300 | 300 | 620 |
| KC-LG-400 | 400 | 720 |
| KC-LG-500 | 500 | 820 |
| KC-LG-600 | 600 | 920 |
| KC-LG800 | 800 | 1120 |
| KC-LG-1000 | 1000 | 1320 |





