Windows ®

Approved partner Keller Minimal Windows

The minimal windows® sliding systems offer maximum energy efficiency thanks to the optimized thermal insulation of the profiles and the use of large thermal protection glazing.


You can choose between double glazing or triple glazing, or even single glazing for unheated systems.

With triple glazing and depending on the dimensions of the structure, the minimal windows®4 + systems already achieve insulation coefficients worthy of a passive house with Uw values ≥ 0.70 W / m²K.

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Thanks to the Umbris louvered roof, outdoor life takes on a new dimension. The seasons don't matter anymore. Mid-summer or intense winter? Thanks to the tilting slats, you can enjoy your garden or your terrace with family or friends all year round.

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The origins of the company date back to 1968, when the family's handicraft workshop was established. Today, Pirnar is an innovative European leader in the field of home entrances. It is a growing family business with almost 200 employees and an extensive sales network throughout Europe. PIRNAR entrances are among the most admired doors on the market, manufactured without compromise.

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