The selection of window and door systems has always been one of the most critical decisions in architectural design. Beyond simply fulfilling a functional purpose, these elements play a central role in determining a building’s comfort, efficiency, and aesthetic appeal. Among the many available options, sliding systems have consistently been at the forefront thanks to their practicality, smooth operation, and ability to optimise limited spaces without encroaching on the interior. In contrast, casement systems have long been appreciated for their outstanding insulation performance and versatile double-opening mechanism.

However, in regions such as India and Southeast Asia, where cold weather is uncommon and thermal insulation is not a primary design criterion, the balance of priorities shifts. In these climates, the convenience of sliding systems is highly valued. Yet, the lack of a double-opening mechanism and limited control over sash positioning often pushes architects and homeowners toward traditional casement systems.

Recognising this gap in the market, STAC has developed an innovative solution that merges the best attributes of both systems. The result is the STAC LR system, a revolutionary design that brings together the functionality of a tilt-and-turn system with the elegance and practicality of sliding doors and windows.

Multipoint Lock
Multipoint Lock

Innovation At The Core

The STAC LR system features a unique sash sequencing mechanism, combined with multipoint locks equipped with limiting devices, allowing users to precisely and easily control the sash’s opening position. This innovation transforms the traditional concept of a sliding door into a multifunctional system that provides security, ventilation, and comfort simultaneously.

With a single arm movement, the window or door can be opened exactly 8 cm, enabling safe and efficient ventilation without compromising safety. For additional protection, a keyed arm can be integrated into the mechanism, ensuring that the sash cannot be extended from the outside. When a full opening is desired, a simple second arm movement deactivates the restrictor, allowing smooth and complete access.

This seamless operation, supported by advanced engineering and high-quality materials, redefines the modern sliding experience, offering architects, builders, and homeowners a product that combines elegance, safety, and innovation in perfect balance.

The LR system is a design solution that allows creative freedom without compromising safety or usability
The LR system is a design solution that allows creative freedom without compromising safety or usability

Key Advantages Of The Stac LR System

  • Improved Security In Everyday Use: Ground-floor or garden-level sliding doors, when left slightly open for ventilation, often pose a serious security risk. An intruder can easily widen the gap to enter silently. The STAC LR system eliminates this vulnerability. When the sash is in the 8 cm ventilation position, external access is blocked without the use of force or tools. While it should not be considered fully burglar-proof, LR serves as a strong barrier and deterrent, giving residents greater peace of mind.
  • Protection Against Animal Intrusion: In many Asian regions, homeowners frequently face an unexpected problem of monkeys and other animals entering through open windows or doors. Agile and curious, these animals can cause significant property damage and even pose physical risks to residents. The STAC LR system allows safe ventilation while keeping these unwanted guests out, ensuring a secure and comfortable indoor environment. Whether in villas, apartments, or high-rise buildings, users can now ventilate their homes without fear of intrusion.
  • Enhanced Child Safety: Families with young children often struggle to find a balance between ventilation and safety. Leaving a sliding door slightly open can allow children to step out onto balconies or gardens unsupervised, posing serious risks, especially in high-rise buildings. The STAC LR’s 8 cm opening eliminates this danger. Parents can safely ventilate their homes knowing that the system prevents children from accessing outdoor areas while maintaining fresh airflow.
  • Peace Of Mind For Pet Owners: Pet owners face similar challenges. Cats and dogs are naturally curious and may slip outside through partially open doors or windows. With the STAC LR system, users can enjoy ventilation without worry, as the limited opening safely keeps pets inside while still providing a pleasant indoor climate.
The STAC LR system features a unique sash sequencing mechanism, combined with multipoint locks equipped with limiting devices
The STAC LR system features a unique sash sequencing mechanism, combined with multipoint locks equipped with limiting devices

A Smart Solution For Modern Architecture

The STAC LR system reflects the brand’s ongoing commitment to innovation, functionality, and user well-being. By addressing security, safety, and ventilation simultaneously, STAC offers a product that enhances both the aesthetic and practical aspects of modern living spaces.

For architects, the LR system is a design solution that allows creative freedom without compromising safety or usability. It provides a new level of flexibility in residential, hospitality, and commercial projects, helping architects differentiate their designs with intelligent, user-centred innovations.

By transforming creative ideas into high-performance solutions, STAC continues to set new standards in the global door and window industry. Each product developed by STAC is a reflection of its dedication to improving daily life through design excellence and advanced technology.

LR system brings together the functionality of a tilt-and-turn system with the elegance and practicality of sliding doors and windows
LR system brings together the functionality of a tilt-and-turn system with the elegance and practicality of sliding doors and windows

Stac: Partnering With Architects To Shape The Future

STAC stands as a trusted partner for architects who strive to push the boundaries of modern design. Every day, the company reinforces its leadership by transforming creative architectural concepts into tangible innovations. The STAC LR system is a perfect example of this philosophy, merging safety, practicality, and aesthetics to redefine the modern sliding experience.

Architects who choose STAC distinguish themselves through thoughtful design decisions that prioritise both function and form, and their projects continue to earn recognition for their innovation, awareness, and forward-thinking approach.

For More Information, Contact:

Doctor Window Pvt. Ltd.

Website: www.doctorwindow.com
Email: support@doctorwindow.com
Phone: +91 75054 44444

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