ALPES builds the AW90 as its passive-grade inward-opening window, and it ships with Winkhaus hardware as standard. That combination is worth understanding before you specify it, because a passive window is not a single number on a datasheet. It is the frame, the glass, the gasket stack, and the locking hardware all performing at the same time. The Winkhaus name matters here less as a logo and more as the mechanism that keeps the sash pressed into its seal year after year.
A passive building is designed to hold comfort with almost no active heating or cooling. For a window that means very low heat loss, tight airtightness, and a frame that does not become a cold bridge. The AW90 is built around a 6060-T66 aluminium profile with a 1.8 mm wall that meets the new national standard, wrapped in a multi-chamber thermal break with an added insulation sponge. ALPES states a thermal K-value of 1.3 for this system. Treat that as the product's frame-side thermal baseline: the whole-window Uw you would need for a formal Passive House component certificate depends on the exact insulated-glass build, so ask ALPES for the certified whole-window value for your project.
Thermal break and glass get the attention, but a window only performs as well as its perimeter seal. If the sash does not sit evenly against the frame, warm air leaks and the best K-value on paper collapses inside the room. This is where the operating hardware earns its place. Tilt-and-turn geometry lets one sash both swing in and tilt in for draft-free ventilation, and the hardware has to hold that sash square against the frame in both positions, through thousands of cycles and seasonal movement. Winkhaus brings roughly 169 years of German engineering to that problem, and ALPES mates it to its own 360 degree locking-point distribution on the AW90.
Reading the AW90 specification, the story is consistent: a rigid, well-sealed aluminium chassis paired with a heritage German lock set. The headline figures ALPES publishes for the AW90 are below.
| Parameter | AW90 value |
|---|---|
| Profile grade and wall | 6060-T66 aluminium, 1.8 mm |
| Thermal break | Multi-chamber strip plus insulation sponge |
| Stated thermal K-value | 1.3 |
| Frame and sash width | 90 mm and 90 mm |
| Mullion width | 72 and 4 mm |
| Opening method | Tilt-and-turn and inward opening |
| Hardware | Winkhaus, 169-year German engineering, optional C-Slot ROTO |
| Locking | 360 degree locking-point distribution |
| Shear resistance | 5,000 N |
| Corrosion test | 240-hour salt spray |
| Sealing | Dual-matrix eight-layer sealing |
| Screen | 40 hash black stainless-steel mesh, standard |
The AW90 is marketed by ALPES as a passive window, but a passive label on a product name is not the same as a Passive House Institute component certificate. Before you write it into a spec, confirm three things in writing: the whole-window Uw for your chosen glass, not the frame K alone; the tested airtightness and water-tightness class; and the burglar-resistance class. ALPES can supply the relevant reports and drawings for the AW90. The 240-hour salt-spray and 5,000 N figures are ALPES own published test results, not a project accreditation, so request the project-specific certificate when your code requires one.
ALPES runs a 100,000 square metre production base in Foshan and Zhaoqing and has supplied villa projects across Saudi Arabia, Dubai, the wider Middle East, and Australia, so the AW90 is a system built for real export and warm-climate residential work rather than a catalogue-only product. If you are comparing suppliers, a credible tilt and turn window company should hand you the test reports above without hesitation. For a European-spec comparison baseline, an european tilt and turn window sets the bar on sealing and hardware redundancy, and ALPES offers the same opening logic as a tilt and turn aluminum windows wholesale option for dealers and project buyers.
