Design windows and doors from KELLER – for absolutely top quality.

 KELLER bespoke windows and doors are high-quality, sophisticated solutions for the exclusive design of private and commercial buildings, whether new builds or for refurbishment and renovation. The high technical standard of aluminium and wood-aluminium frames and state-of-the-art technology guarantee top performances in terms of optimal thermal and acoustic insulation, good weather-resistance and high quality safety solutions with maximum transparency.

Aluminium window aluminium door highly insulating U-value


KELLER uses top-quality thermally isolated aluminium profile systems for its aluminium windows and aluminium doorsy.

Wood-aluminium window weather-resistant thermal insulation


Wood-aluminium windows combine the good thermal insulation of wood with the resistance to weathering of aluminium.

Front door sound insulation insulating value burglar-proof


Our exclusive front doors are produced in-house. They correspond to the highest demands in terms of insulation, security and soundproofing.

minimal windows

The desire for design and exclusivity is more than met by KELLER’s premium sliding and fixed window system - minimal windows®. The frame profiles are pared back to the minimum and can be integrated fully into the floor, walls and ceiling.

high quality profile systems

 When it comes to our windows, doors and sliding doors we consistently use the latest technologies and set new quality standards.

The latest energy-efficiency and safety requirements are therefore considered for our bespoke aluminium and wood-aluminium elements. Particularly the use of high quality profile systems with proven thermal insulation characteristics and high-quality insulating glass panes are a guarantee of energy-conscious building and living.

Folding system sliding system folding partition


As well as KELLER products, we also offer our customers high-quality folding-sliding walls from Sunflex®.
KELLER presents systems in varying designs which can be configured to your preferences.

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