Passive house standards demand more from windows than traditional building codes ever have. To achieve the ultra-low energy consumption that defines passive design, every component — from frame profiles to sealing systems — must work in perfect harmony. At the heart of this performance equation lies a feature that is often overlooked yet fundamentally transformative: the 360-degree locking system. The AW90 passive window, engineered by ALPES, redefines what full-perimeter locking can deliver, combining industry-leading security with thermal performance that meets the world's strictest efficiency standards.
Unlike conventional single-point or even basic multi-point locking systems, a 360-degree locking system distributes locking points around the entire perimeter of the window sash — top, bottom, and both sides — creating a continuous, evenly compressed seal. When the handle turns, a central gearbox simultaneously engages multiple locking points at strategic locations along all four edges, rather than just along one vertical edge.
This full-perimeter approach is what makes the AW90 passive window exceptional. By securing the sash at every corner and along every edge, the system eliminates the weak points that typically allow drafts, water infiltration, and forced entry attempts. The result is a window that behaves more like a structural panel than an opening — firmly integrated into the building envelope on all sides.
The security advantages of 360-degree locking are substantial. Traditional windows with only two or three locking points along one side leave the opposite edge and the top/bottom corners vulnerable to prying. The AW90's full-perimeter locking configuration means an intruder would need to defeat multiple strategically placed locking points simultaneously — a feat that requires far more time, noise, and force than most burglars are willing to attempt.
ALPES engineers the AW90 with rigorous testing in mind. Each window undergoes a 240-hour salt spray corrosion resistance test to ensure the locking hardware withstands harsh coastal and industrial environments without degradation. The system also achieves an impressive 5,000N shear resistance strength, meaning the locking points can withstand forces equivalent to 500 kilograms of shear pressure before failing. These are not arbitrary numbers — they represent verified engineering benchmarks that set the AW90 apart from budget alternatives.
In passive house design, airtightness is everything. Even small gaps around windows can allow enough air leakage to undermine an entire building's energy strategy. The 360-degree locking system on the AW90 directly addresses this challenge by compressing the sash evenly against the frame's sealing gaskets on all four sides simultaneously.
This uniform compression is critical. A window locked only at the handle side may gap slightly at the opposite edge, creating an invisible pathway for conditioned air to escape and outdoor air to infiltrate. With 360-degree locking, the pressure is distributed evenly around the entire perimeter, ensuring the seal is consistent and complete. The result is a thermal performance rating with a K-value as low as 1.3 — a level that qualifies the AW90 as a true passive house window.
For homeowners and developers, this level of thermal efficiency translates directly into lower heating and cooling costs, improved interior comfort, and a smaller carbon footprint. As a leading casement window manufacturer, ALPES designs the AW90 to exceed the expectations of architects and builders who specialize in high-performance construction.
The 360-degree locking system works in concert with ALPES's proprietary Dual-Matrix Eight-Layer Sealing system to create a barrier that blocks air, water, noise, and temperature transfer. This eight-layer sealing architecture includes extended seals, composite seals, welded corner seals, threaded seals, and dense seals — each contributing a specific line of defense.
The full injection adhesive process used on the frame, mullion, glass sash, and screen ensures that every joint and corner is completely sealed. Combined with the pressure from the 360-degree locking points, this multi-layered approach creates an air barrier that far exceeds what single or double sealing systems can achieve. It is this synergy between the locking mechanism and the sealing system that makes passive-level thermal performance possible.
A locking system is only as good as the hardware that powers it. ALPES equips the AW90 passive window with Winkhaus hardware — a German manufacturer with 169 years of engineering heritage. Winkhaus is globally recognized for precision, durability, and innovative locking solutions, making it the ideal partner for a high-performance passive window system.
For projects that prefer alternative hardware configurations, the AW90 also supports optional C-Slot ROTO hardware, another respected German brand. This flexibility allows architects and builders to specify the exact hardware combination that best suits their project requirements, without compromising on the 360-degree locking performance that defines the AW90.
The window's 6060-T66 aluminum profile, with a 1.8mm thickness that meets China's new national standard, provides the structural rigidity necessary to support the full-perimeter locking system. The multi-chamber insulation strip design, combined with insulation sponge, further enhances thermal performance while maintaining the slim, modern aesthetic that premium tilt and turn windows are known for.
The AW90 is an inward-opening tilt and turn window, meaning it offers two distinct operating modes: a full inward swing for easy cleaning and emergency egress, and a tilt position at the top for secure natural ventilation. Both modes benefit from the 360-degree locking system, which ensures a perfect seal when fully closed and secure positioning when tilted.
The tilt position is particularly valuable in passive house design, as it allows controlled ventilation without compromising security. With the 360-degree locking system engaged in tilt mode, the window remains firmly secured at the bottom and side locking points, preventing it from being opened further from the outside while still allowing fresh air to circulate. This combination of ventilation, security, and thermal performance is what makes the AW90 a versatile choice for modern residential and light commercial projects.
ALPES manufactures the AW90 passive window in its 100,000-square-meter production facilities across Foshan and Zhaoqing, China, and exports to markets worldwide. The company has supplied high-end aluminum windows and doors for luxury villa projects in Saudi Arabia, Dubai, Australia, and across the Middle East, earning a reputation for delivering European-level quality at competitive direct-from-factory pricing.
Each AW90 window is built to international building codes and can be customized with standard colors including Ice Cream White, Aurora Gray, Starry Sky Gray, and Brown Coffee, with custom color matching available for large-scale projects. Whether you are building a passive house certification project, a luxury residential development, or a high-performance commercial building, the AW90's 360-degree locking system delivers the security, efficiency, and durability that discerning clients demand.
The 360-degree locking system is more than a security feature — it is an enabling technology that makes true passive house window performance possible. By distributing locking force evenly around the entire sash perimeter, the AW90 achieves the level of airtightness, thermal efficiency, and structural integrity that modern high-performance construction demands.
Backed by German hardware, precision aluminum engineering, and rigorous testing standards, the AW90 passive window represents a compelling choice for architects, developers, and homeowners who refuse to compromise on either security or energy efficiency. In a market where many windows claim to be high-performance, the 360-degree locking system of the AW90 delivers measurable, verifiable results that speak for themselves.
