KELLER minimal windows®4+


KELLER minimal windows®4+ Driving rain tightness Class E1050 according to EN 12208

Design sliding system permanently driving-rain-tight

KELLER minimal windows®4+ design sliding systems achieve an outstanding driving rain tightness according to




Product Name
KELLER minimal windows®4+

Product Type

Window profiles
Aluminium windows


Catalogues (4)

Product description

KELLER minimal windows®4+ Driving rain tightness Class E1050 according to EN 12208

Design sliding system permanently driving-rain-tight

KELLER minimal windows®4+ design sliding systems achieve an outstanding driving rain tightness according to the EN 12208 standard with over 1,050 Pascal. 1,050 Pascal correspond to the high wind pressure of 105 kg/m² element area with simultaneous spray irrigation. KELLER AG has an in-house, certified test centre on which the corresponding performance tests can be carried out according to international standards and under the supervision of a recognised test institute.

Sophisticated sliding door construction with maximum performance

Tests on the test stand show up all the strengths of every construction, but they also ruthlessly expose its weaknesses. The KELLER minimal windows®4+ design sliding windows and doors feature structurally complex sealing technology. The use of high-quality seals guaranties top-class wind, air and driving rain tightness while at the same time ensuring low-friction, easy movement of the sliding leaf. This was confirmed in impressive fashion in the performance tests that have just been carried out. Our own targets were well exceeded with absolutely top values, in particular for the driving rain tightness, and values were achieved that have no equal in large-sized sliding systems:

Driving rain tightness (> 1,050 Pa) Class E1050 (wind velocities of 150 km/h), wind force 12+ (severe hurricane) in accordance with EN 12208

In the same test the well-known maximum values for air permeability and resistance to wind load were confirmed in impressive fashion:

Air permeability: Class 4 according to EN 12207

Resistance to wind load Class C5 according to EN 12210 wind speeds > 200 km/h, wind loads up to 2,000 Pa (200 kg/m²)

Wind, air and driving rain tightness is rapidly gaining in significance in these times of climatic change (heavy rain, storm gusts). The facade of a building is exposed to constant stress through wind and rain. The higher a window is installed in a building, the greater its resistance must be to wind loads, driving rain and draughts.

In reaching the 1,050 Pascal limit and with certification to Class E1050, KELLER AG has set new standards in driving rain tightness for design sliding doors and windows.

Low energy standard and slender design as a unit

Modern architecture is characterised by clear lines and large window areas that flood rooms with light. Since 2007 KELLER AG has been supporting architects and building owners all over the world in creating modern, bright living space in their projects with its KELLER minimal windows® system. With the KELLER minimal windows® system it is possible to realise large-area fixed and sliding windows in glass and thus to achieve maximum transparency. With their puristic reduction, the profile frames retire completely into the background.

Significantly improved design standards are becoming accepted due to increased environmental awareness and the striving to implement highly efficient energy applications. This high standard of energy-saving glazing and maximum energy efficiency is met by the new Keller minimal windows®4+ series. The KELLER minimal windows®4+ system offers outstanding thermal insulation with Uw values of less than 0.80 W/m²K and meets the latest low-energy standards thanks to triple glazing. Sliding leaf areas of up to 12 m² can be realised, and with maximum ease of use at that.

KELLER minimal windows® have in the meantime made a name for themselves beyond Europe. The new sliding window system won the Innovation Award at the international building trade show ‘BAU 2009’ in Munich and was also among the laureates of the Luxembourgian Innovation Award 2010. These successes are indicative of how well the system has been received by the trade and of the outstanding quality of the large-area window elements.

Architects, glass manufacturers and specialist companies place their trust in the high quality standards of KELLER minimal windows®. Constant further development contributes to the fact that large glass surfaces with leaf weights of up to 1000 kg can be used. This is made possible in particular by the specially developed roller carriage technology, while retaining the slender profile design. Glass thicknesses of up to 56 mm can be used without problem.

With the innovative KELLER minimal windows® sliding window system, the KELLER company is pursuing the ambitious goal of offering the market the best solutions, in terms of both execution and design, and of convincing with outstanding system characteristics.