Minimalism, also
for Passivhaus

Strength, durability and energy efficiency taken to the extreme.

Larglass is a fibreglass composite system that helps to reduce energy costs and provide greater environmental protection. Due to its thermal performance, it is optimal for the implementation of projects that aim to comply with the passivhaus certification.

In addition, the production process is very environmentally friendly as it incorporates elements that have already been recycled. Up to 80% less energy is required compared to traditional methods.


Curtain wall composed of the latest fibreglass technology.


Fibres and resins come together to create the optimum system to reduce thermal transmission, significantly increase structural strength and provide high product durability.

Moreover, it is a reversible system that gives the window an opening angle of 165º, allowing the glass to be cleaned from inside the building, facilitating maintenance on the windows of the building’s façade.


Thermal transmittance
Uw 0.79 W/m2 K

Up to
Uw 1.3 W/m2 K


Structural strength

ESG Glass


Sound insulation
ISO EN 10140 + ISO EN 717

Rw: 34db – 48db

Sash opening at 165º

Simple cleaning

Energy certification


Download data sheet
Alumilux Alumilux

1 opening
system possible



The casement window is characterised by its horizontal opening. It is a system of multiple combinations. The use of structural glass allows for large dimensions. The only limits are set by the glass industry.

Motorisation and home
automation system

All OTIIMA windows can be motorised.

The reversible motorisation has been designed for the Larglass series only. The sash opens 165°, so that it becomes reversible when the user wishes.

This system means that a curtain wall façade does not become a problem to clean, allowing maintenance to be carried out from inside the building.


Specialists in large dimensions, curves and inclines.

Discover more
Otiima series

Do not be left with any doubt about our entire range of products

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