Open living spaces for maximum natural light
Our minimal windows® double-glazed window system is an almost frameless, smooth-sliding aluminum sliding window system with a delicate sash profile of just 21 mm. Thanks to the large sliding sashes with a height of up to 4 meters and practically invisible frame profiles, you can fully enjoy an unobstructed view of the outdoors. Let yourself be enchanted by breathtaking panoramic views of the sea, dream under the sparkling night sky, or enjoy the beauty of natural landscapes and gardens.
In modern contemporary architecture, the use of minimalist materials is at the center to create a seamless transition between indoor and outdoor areas. Clear lines, balanced proportions, and above all, one element play an important role - natural light. Whether it's an exclusive villa, single-family house, apartment, or commercial space, open room design with an unobstructed view of the outdoors and maximum daylight is at the top of the priority list in architectural design today. Flush floor-to-ceiling glass fronts seamlessly blend into any environment.
Thanks to our over 15 years of meticulous adaptation work, we have perfected the technology of concealed floor track systems, making the sliding elements effortlessly easy to operate.
Technical DetailsProfile facing width21 mmMaximum leaf height4 mThermal transmission coefficientUw ≥ 1,1 W/(m²K)Maximum leaf area slidingup to 8,5 m²Maximum leaf area fixup to 18 m²Maximum leaf weight500 kgOverall insulation glass thickness26 up to 34 mmAutomated sliding leafyes up to 2,400 kgUnobstructed accessibilityDIN 18040-1, DIN 18040-2Air permeabilityClass 4 according to EN 12207Rain resistanceClass 8A according to EN 12208Wind load resistanceClass C4/B5 according to EN 12210Sound insulationUp to 39 dB according to ISO 717-1Burglary protectionUp to WK2 (RC2) according to EN 1627
- Ultra-slim design, countless arrangement options
Thanks to the narrow visible width of the aluminum frame profiles, they are almost invisible, showcasing the minimalist design of Keller minimal windows® to perfection. The system offers virtually unlimited arrangement possibilities and countless design options, providing maximum flexibility in practice and leaving virtually no desires unfulfilled. Post-free interior or exterior corners, all-glass corners, reversible elements, and wall pockets where the element disappears completely into the wall are all possible. In addition to a wide range of colors, you can also choose between different surface textures - whether matte, glossy, or powder-coated, you will surely find something to your taste.
- Huge open glass areas create a calm appearance
Thanks to the minimalist frame profile, the glass surfaces seamlessly blend into the floor, ceiling, and walls. The outer frame is almost completely integrated into the wall, creating spacious, open living spaces through large window areas. The abundant natural light indoors creates a serene and celebratory atmosphere. Currently, wing heights of up to 4m and weights of up to 500kg are possible. With up to four-track sliding systems, we create exceptional, expansive living environments. We realize even the most extraordinary and demanding projects - there are no limits to your architectural ideas with us.
- Exceptional performance in every project
When you choose Keller minimal windows®, you opt for products of the highest quality. Our system offers excellent thermal insulation values, ensuring consistent indoor temperatures and optimal living conditions throughout the year. To prevent thermal bridges, insulating bars made of polyamide are integrated into the outer part of the frame. This reduces energy consumption and costs. During hot weather, the air-conditioned cool air remains inside. If needed, the windows can be equipped with sun protection film.
Our systems are equipped with multi-point locking, providing excellent burglary protection. They are certified according to standards for burglar-resistant components and meet resistance class RC 2. The minimal windows® sliding systems are custom-made and individually tailored to the preferences and installation requirements of our customers. Optional additional features include a linear drive, lock monitoring with magnetic contacts, or security sensors. To ensure maximum security, our products are also compatible with a wide range of security accessories.
Pocket Sliding Doors
Pocket Sliding Doors
Specially designed pocket sliding doors allow the minimal windows® sliding panels to fully disappear into the wall, making the automatically or manually operated sliding elements completely invisible and creating an even larger space. The barrier-free transition to the outside is also ensured.
Stainless Steel Track and Roller Guide
Stainless Steel Track and Roller Guide
Our stainless steel track, fully integrated into the bottom edge of the outer frame, ensures optimal sliding performance and silent operation of the transparent sliding panels. The system is completely maintenance-free. The roller guide resting on the track fits perfectly and is designed to match the track.
The self-centering integrated stainless steel roller guide is concealed and mounted in the lower profile of the sliding panels. With this special design, dust or dirt that could affect the sliding performance is kept away from the operating system as much as possible. The high-quality stainless steel rollers ensure high stability under load and effortless operation of the sliding panels weighing up to 1,000 kg.
For reliable drainage, a specially designed PVC hollow chamber profile is used. This drainage profile is installed below the lower aluminum frame profile.
Alternatively, a concealed drainage channel with a stainless steel cover is also available. Regardless of which minimal windows® system or combination of systems you have chosen, we customize the drainage system according to your needs to ensure reliable water drainage.
The outer frame can be fully integrated into walls, ceilings, and floors, creating a flush finish. In the open position, this creates a seamless transition between the interior and exterior areas without any thresholds. The integrated stainless steel track is installed flush into the floor, without any protruding elements. Another advantage is the maintenance-free nature of the system.
The flush-mounted minimal windows® freeway track provides a threshold-free passage to the outside, making it fully accessible. The outer frame is fully integrated into the floor, so the track is level with the floor, eliminating any obstacles to trip over. The freeway system is tested, certified, and maintenance-free.
For effortless, long-term protection against unwelcome guests, Keller minimal windows® offers integrated, tailor-made insect screens within the system. The insect screens are nearly invisible, ensuring minimal obstruction to the view. The color of the insect screens can be matched to the frame color. When not needed, the protective screens can be fully recessed laterally or upwards into a niche in the wall. The following systems are available :
- Pleated insect screens : available for minimal windows® and minimal windows® 4+
- Insect screen sliding door : available for minimal windows® and minimal windows® 4+
- Roll-up insect screen : available for minimal windows® 4+ and minimal windows® NGS
For floor-to-ceiling window openings, fall protection is necessary. Strength, stability, and suitability of the material are crucial in designing railings. The minimal windows® guardline glass railings* combine outstanding quality and safety with elegant design. Thanks to modern techniques for seamless installation, the components seamlessly integrate into the respective architectural design.
*Country-specific regulations must be observed.
We offer the option to customize our systems with a range of concealed drive and locking systems, increasing ease of operation. The motorized sliding panels can be effortlessly controlled with a remote, and the control can be equipped with infrared sensors or a manual dead man's switch. With just a single drive, multiple sliding elements weighing up to 2,400 kg can move silently into the desired position. The automatic control via a telescopic rail allows for easy movement of large areas.
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